PhyLab - User contributions [en]

Tablecloth and dishes

2018-09-21T20:16:12Z

Mwong017: /* Equipment */

__NOTOC__
Back to [[1F_-_Newton%27s_First_Law|1F - Newton's First Law]] 
PIRA index: 1F20.30

==Description==
A tablecloth is quickly pulled from underneath a beaker filled with water. The beaker does not topple over due to inertia.

==Equipment==
*4 L beaker filled with water
*Tablecloth
*Flat surface

==Instructions==
Lay the tablecloth flat on the table and place the filled beaker on top of it. Swiftly pull the tablecloth off the table and the beaker should remain in place.

==Keywords==
tablecloth, napkin, beaker, water, dishes

==Images & Movies==
<gallery>
File:1F20.30_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=tE5QAuoA4N4}}

Main Page

2018-09-12T20:17:04Z

Mwong017: /* Borrowing a demonstration for a lecture */

'''Welcome to the University of Ottawa Physics Demonstration wiki page!'''

== Browsing demonstrations ==
Lecture physics demonstrations available at the university of Ottawa can be found on this site. They are sorted following the [http://physicslearning.colorado.edu/bib/bibMain.asp PIRA Demonstration Classification Scheme] (see the list of topics on the left side of the page). You can also use our search engine located at the top of this page.

== Borrowing a demonstration for a lecture ==
If you need to borrow a demonstration for your class, please contact the 1st year laboratory staff in person at STM 377, by phone at x6766, or [mailto:phylab@uottawa.ca by email] at least 48 hours before your lecture.

Fire syringe

2018-02-23T18:12:04Z

Mwong017:

__NOTOC__
Back to [[4B - Heat and the first law|4B - Heat and the first law]] 
PIRA index: 4B70.10

==Description==
The adiabatic compression of gasses produces heat, enough to ignite some materials.

==Equipment==
* Fire syringe
* Small piece of flammable material with a lot of surface (e.g. lint, paper towel, etc)
* Practice

==Instructions==
Place flammable material in the barrel of the piston. Push the plunger with force and speed. With practice, the syringe won't break or fly off in a random direction. Observe the material ignite.

Note: a camera connected to the podium can be provided to allow big class to see the relatively small syringe.

==Images & Movies==
<gallery>
File:4B70.10 Fire syringe.jpg|Figure1
</gallery>

==Keywords==
* fire syringe, lint, adiabatic compression

File:4B70.10 Fire syringe.jpg

2018-02-23T18:10:29Z

Mwong017: Picture of the fire syringe (fire piston).

Picture of the fire syringe (fire piston).

Transformer with light bulb

2018-02-02T18:56:38Z

Mwong017: /* Keywords */

__NOTOC__
Back to [[5K - Electromagnetic induction]] 
PIRA index: 5K30.30

==Description==
A transformer is made from a coil gun with another coil with a light bulb attached to it.

==Equipment==
* Coil gun
* Light bulb with big coil

==Instructions==
The secondary coil with attached light bulb is placed on top of the vertical transformer when it is on, causing the light to turn on.

==Keywords==
vertical, transformer, light, bulb, secondary, coil, electromagnetic, electric, induction, gun

==Images & Movies==
{{#widget:YouTube|id=iccc91DLF50}}

Transformer with light bulb

2018-02-02T18:56:02Z

Mwong017: /* Instructions */

__NOTOC__
Back to [[5K - Electromagnetic induction]] 
PIRA index: 5K30.30

==Description==
A transformer is made from a coil gun with another coil with a light bulb attached to it.

==Equipment==
* Coil gun
* Light bulb with big coil

==Instructions==
The secondary coil with attached light bulb is placed on top of the vertical transformer when it is on, causing the light to turn on.

==Keywords==

==Images & Movies==
{{#widget:YouTube|id=iccc91DLF50}}

Transformer with light bulb

2018-02-02T18:54:07Z

Mwong017: /* Description */

__NOTOC__
Back to [[5K - Electromagnetic induction]] 
PIRA index: 5K30.30

==Description==
A transformer is made from a coil gun with another coil with a light bulb attached to it.

==Equipment==
* Coil gun
* Light bulb with big coil

==Instructions==

==Keywords==

==Images & Movies==
{{#widget:YouTube|id=iccc91DLF50}}

Flexible wind tube

2016-06-16T15:47:17Z

Mwong017: /* Description */

__NOTOC__

Back to [[3D_-_Instruments|3D - Instruments]] 
PIRA index: 3D30.35

==Description==
A flexible, corrugated plastic tube, hollow on both ends, is spun around in a circle. The air flowing through the tube creates a sound due to standing wave resonance.
Also can be called a "whirly tube", a "corrugaphone", or a "bloogle resonator".

==Equipment==
*wind tubes

==Instructions==
Hold the tip of the tube and swing it rapidly in a circle. If you swing it fast enough you will be able to hear the emitted sound. The pitch depends on the length of the tube and its velocity.

==Keywords==
frequency tube, wind organ pipe

==Images & Movies==
<gallery>
File:3D30.35_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=xTdYGyroH1A}}

Climbing double cone

2015-08-28T17:20:53Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1J_-_Statics_and_Rigid_bodies|1J - Statics and Rigid bodies]] 
PIRA index: 1J20.70

==Description==
A double cone, when placed between two angled rods, will climb up the rods due to the its shape.

==Equipment==
*double cone
*rods attachment
*riser
*level

==Instructions==
Place the rods attachment on the riser (catalog) such that the split end is raised higher. Show that this end is higher using the level. Place the double cone on the lowered end and watch it roll (climb) upwards towards the split end.

==Keywords==
double cone, rods, defying gravity, climbing

==Images & Movies==
<gallery>
File:1J20.70_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=0Nc2ihCkpYw}}

Bicycle wheel as spinning top

2015-08-28T15:27:46Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[1Q_-_Rotational_Dynamics|1Q - Rotational Dynamics]] 
PIRA index: 1Q40.30

==Description==
A large bicycle wheel works as a spinning top, staying upright by conservation of rotational energy.

==Equipment==
*bicycle wheel and motor
*c-clamp and power for the motor

==Instructions==
Spin the bicycle wheel using the motor and then lay it horizontally on the floor on its handle. It should stay upright and spinning.

==Keywords==
bicycle, wheel, top, spin

==Images & Movies==
<gallery>
File:1Q40.30_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=Ayu61Rt-zHk}}

Bicycle wheel as gyroscope

2015-08-28T15:27:36Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[1Q_-_Rotational_Dynamics|1Q - Rotational Dynamics]] 
PIRA index: 1Q50.21

==Description==
The bicycle wheel is rotating rapidly and is hanging from a rope attached to a rod protruding from the wheel's center. The wheel begins to torsionally rotate.

==Equipment==
*bicycle wheel and motor
*c-clamp and power for the motor
*rope

==Instructions==
Spin the bicycle wheel using the motor then let it hang from the rope. The wheel will stay upright and rotate torsionally.

==Keywords==
bicycle, wheel, torsional, rotation, gyroscope

==Images & Movies==
<gallery>
File:1Q40.30_1.JPG|Figure1
</gallery>

Tightrope walker

2015-08-28T15:23:59Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1J_-_Statics_and_Rigid_bodies|1J - Statics and Rigid bodies]] 
PIRA index: 1J20.45

==Description==
A metal disc is balanced on either side by small masses and rolls down a rope. This simulates a tightrope walker using a long pole to balance himself. 
Also known as a '''funambule''' in french.

==Equipment==
* Tightrope walker
* String
* Two c-clamps with rods

==Instructions==
Attach a taut string between two rods at a small angle (15 - 30°). Place the tightrope walker at the highest point of the string and watch it travel down.

==Keywords==
tightrope, walker, funambule, balance, center, mass, gravity, rope, disc

==Images & Movies==
<gallery>
File:1J20.45_1.JPG|Figure1
</gallery>

Monkey and hunter

2015-08-28T15:21:59Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1D_-_Motion_in_two_dimensions|1D - Motion in two dimensions]] 
PIRA index: 1D60.30

==Description==
A hunter spies a monkey in a tree, takes aim, and fires. At the moment the bullet leaves the gun the monkey lets go of the tree branch and drops straight down. Does the hunter's bullet hit the monkey?
 
To simulate this experiment, a ballbearing is aimed upwards at a suspended metal disc. When the ballbearing is shot, the disc is released. The ballbearing will hit the disc because their vertical acceleration is equal.

==Equipment==
*Double cylindrical tube setup
*Vacuum pump
*Flexible 3/8" diameter hose
*Power cord
*Power bar

==Instructions==
Intruct please.

==Keywords==
monkey, fall, ballbearing, shoot, disc, acceleration, vertical, projectile

==Images & Movies==
<gallery>
File:1D60.30_1.JPG|Figure1
File:1D60.30_2.JPG|Figure2
File:1D60.30_3.JPG|Figure3
File:1D60.30_4.JPG|Figure4
</gallery>

Tennis racket rotation

2015-08-28T15:19:55Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1D_-_Motion_in_two_dimensions|1D - Motion in two dimensions]] 
PIRA index: 1D40.00

==Description==
The center of mass in a tennis racket is at the base of the loop. This is shown when the tennis racket is spun in the air.

==Equipment==
*Tennis racket

==Instructions==
Throw the tennis racket in the air such that it rotates rapidly, end over end. The center of mass of the racket will appear to fly in a parabolic pattern.

==Keywords==
tennis racket, centre of mass, rotation

==Images & Movies==
<gallery>
File:1D40.00_1.JPG|Figure1
</gallery>

Block pull

2015-08-28T15:13:05Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1K_-_Applications_of_Newton%27s_Law|1K - Applications of Newton's Law]] 
PIRA index: 1K20.30

==Description==
Pull a wooden block using a string.

==Equipment==
*block and string

==Instructions==
Pull the block using the string. The block will slide across the table as long as the angle of the string is not too big (less than 90 degrees).

==Keywords==
block, string, pull

==Images & Movies==
<gallery>
File:1K20.30_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=htEkjbZuCRg}}

Inclined plane

2015-08-28T15:11:12Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[1Q_-_Rotational_Dynamics|1Q - Rotational Dynamics]] 
PIRA index: 1Q10.30

==Description==
A ball rolls down an inclined plane. The angle of the incline is adjustable.

==Equipment==
*inclined plane and rod setup
*tennis ball

==Instructions==
Adjust the inclined plane to the desired angle. Let the ball roll down the plane.

==Keywords==
incline, plane, ramp, ball, roll

==Images & Movies==
<gallery>
File:1Q10.30_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=bsjK8kMHT74}}
{{#widget:YouTube|width=600|height=337|id=60CeiImSQSk}}

Rolling basketball

2015-08-28T15:09:20Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1F_-_Newton%27s_First_Law|1F - Newton's First Law]] 
PIRA index: 1F30.00

==Description==
A basketball rolls along a table, demonstrating Newton's first law of motion.

==Equipment==
*basketball
*flat surface

==Instructions==
Roll the basketball slowly along the table.

==Keywords==
basketball, table, Newton's First Law

==Images & Movies==
<gallery>
File:1F30.00_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=WwaomqVIJc8}}

Rolling basketball

2015-08-28T15:09:01Z

Mwong017: /* Keywords */

Balloons

2015-08-28T15:07:49Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[1N_-_Linear_Momentum_and_Collisions|1N - Linear Momentum and Collisions]] 
PIRA index: 1N22.25

==Description==
An inflated balloon will fly in a random pattern as it is released.

==Equipment==
*balloons (various shapes/sizes)
*strong lungs

==Instructions==
Inflate a balloon to desired size and let it fly!

==Keywords==
balloon, random pattern, random motion

==Images & Movies==
<gallery>
File:1N22.25_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=Qsf8_J6YsF0}}

Balloons

2015-08-28T15:07:35Z

Mwong017: /* Keywords */

Air track

2015-08-28T15:06:41Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[1C_-_Motion_in_one_dimension|1C - Motion in one dimension]] 
PIRA index: 1C10.25

==Description==
An air track demonstrates frictionless 1-D travel as well as 1-D frictionless collisions.

==Equipment==
*2 metre long air track
*Air pump
*Flexible hose
*Power cable
*Extension cord
*Gliders (with magnets/pins)
*Motion detectors and computer/software

==Instructions==
Place air track on a flat, level surface.
Adjust feet screws to level the track.
Connect hose from pump to track and turn on pump.
Adjust pump speed as necessary.
Demonstrate frictionless travel and/or collisions using gliders.

==Keywords==
air, track, frictionless, motion

==Images & Movies==
<gallery>
File:1C10.25_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=ZNvBXwd3QXY}}

Cylindrical stack of discs

2015-08-28T15:05:12Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1F_-_Newton%27s_First_Law|1F - Newton's First Law]] 
PIRA index: 1F20.34

==Description==
A stack of cylindrical discs is placed on a table. Discs from the bottom are removed by hitting them with a ruler. The remaining discs drop down to the table each time without falling over.

==Equipment==
*stack of discs
*solid ruler
*flat surface

==Instructions==
Set the stack of discs on a flat surface. Swiftly remove the bottom disc by hitting it with the side of the ruler. The stack should drop down without toppling over.

==Keywords==
disc, mass, ruler, tablecloth

==Images & Movies==
<gallery>
File:1F20.34_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=ZjU23Lna-s0}}

Coriolis effect (painted ball on rotating platform)

2015-08-28T15:03:54Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1E_-_Relative_Motion|1E - Relative Motion]] 
PIRA index: 1E30.28

==Description==
A freshly painted ball is dropped onto the center of a rotating platform covered by white paper. The ball's trail shows a curve from the center to the edge, demonstrating the coriolis effect.

==Equipment==
* Rotating platform
* Plastic ball
* White newsprint paper
* Black spraypaint

==Instructions==
Spraypaint the ball. Start rotating the platform then drop the ball onto the center of the platform.

==Keywords==
coriolis, rotate, rotating, platform, ink, paint

==Images & Movies==
<gallery>
File:1E30.28_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=twaLtCOZmOU}}

Whirligig

2015-08-28T15:03:00Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1D_-_Motion_in_two_dimensions|1D - Motion in two dimensions]] 
PIRA index: 1D50.20

==Description==
A light ball and heavy mass are attached together by a string in a clear tube. When the lighter ball is spun around, it lifts the heavier mass.

==Equipment==
*Whirligig (ball and mass attached by string in clear tube)

==Instructions==
With the lighter ball on top, start spinning the whirligig slowly. The tension in the string will cause the heavier mass to rise.

==Keywords==
ball, mass, 100g, tube, spin, lift, acceleration, tension

==Images & Movies==
<gallery>
File:1D50.20_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=pTvcA4yapag}}

Tablecloth and dishes

2015-08-28T15:01:59Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1F_-_Newton%27s_First_Law|1F - Newton's First Law]] 
PIRA index: 1F20.30

==Description==
A tablecloth is quickly pulled from underneath a beaker filled with water. The beaker does not topple over due to inertia.

==Equipment==
*1L beaker filled with water
*Tablecloth
*Flat surface

==Instructions==
Lay the tablecloth flat on the table and place the filled beaker on top of it. Swiftly pull the tablecloth off the table and the beaker should remain in place.

==Keywords==
tablecloth, napkin, beaker, water, dishes

==Images & Movies==
<gallery>
File:1F20.30_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=tE5QAuoA4N4}}

Cart with vertical ball launcher

2015-08-28T14:59:48Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1D_-_Motion_in_two_dimensions|1D - Motion in two dimensions]] 
PIRA index: 1D60.10

==Description==
A moving cart launches a ball vertically. The ball lands back in the launcher because it has the same horizontal velocity as the cart.

==Equipment==
*Cart with vertical launcher
*Ball bearing

==Instructions==
1) Push the ball bearing down into the cart's launcher and a rod will emerge at the bottom. 
2) Place the pin through the hole in the rod to hold the launcher steady. 
3) Put the cart in motion then pull out the pin. The ball bearing will launch vertically.

==Keywords==
acceleration, velocity, cart, car, ball, launch, shoot, vertical

==Images & Movies==
<gallery>
File:1D60.10_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=TOzzsJMMfBU}}

Fan-car

2015-08-28T14:57:34Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1H_-_Newton%27s_Third_Law|1H - Newton's Third Law]] 
PIRA index: 1H10.20

==Description==
A fan mounted on a cart pushes air against an aluminum plate which causes the cart to move.

==Equipment==
*fan-car

==Instructions==
Place the fan-car on a flat surface. Turn on the fan and watch the car move!

==Keywords==
fan, cart, velocity, aluminum

==Images & Movies==
<gallery>
File:1H10.20_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=DUXwsfIDOXo}}

Roller coaster

2015-08-28T14:56:26Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1M_-_Work_and_Energy|1M - Work and Energy]] 
PIRA index: 1M40.20

==Description==
A cart is only able to complete the loop-de-loop in a roller coaster if it's starting position on the ramp is higher than the top of the loop.

==Equipment==
*roller coaster
*cart

==Instructions==
Place the cart at various positions along the roller coaster's ramp and release it.

==Keywords==
loop-de-loop, loop, roller, coaster, ramp, cart, acceleration

==Images & Movies==
<gallery>
File:1M40.20_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=kgZn-j8FRsM}}

Rocket on air track

2015-08-28T14:55:27Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1H_-_Newton%27s_Third_Law|1H - Newton's Third Law]] 
PIRA index: 1H11.30

==Description==
An angled aluminum cylinder, mounted on a friction-less surface, is filled with liquid CO2 from an spray duster can then sealed with a small aperture. The cylinder is heated and as the CO2 evaporates within the cylinder, gas is expelled through the aperture thus propelling the cylinder forward.

==Equipment==
*air track with pump and tubing, power cable
*rocket cylinder with aperture and seal
*spray duster canister
*torch

==Instructions==
Connect the air track to the pump and turn it on. Invert the spray duster canister and shoot the liquid CO2 it into the rocket cylinder for about 3-4 seconds. Seal the rocket with the aperture and ball stopper and place it on the air track. Heat the lower end of the cylinder with the torch until the rocket starts to move along the track.

==Keywords==
rocket, air track, CO2, carbon dioxide, friction-less, torch, evaporation, aperture

==Images & Movies==
<gallery>
File:1H11.30_1.JPG|Figure1
File:1H11.30_2.JPG|Figure2
</gallery>
{{#widget:YouTube|width=600|height=337|id=ucM7mbj-57Y}}

Glider with magnets

2015-08-28T14:54:18Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1H_-_Newton%27s_Third_Law|1H - Newton's Third Law]] 
PIRA index: 1H10.90

==Description==
Magnets on the end of two gliders on an air track simulate friction-less elastic and inelastic collisions.

==Equipment==
*air track with pump and tubing, power cable
*two gliders
*magnet attachments

==Instructions==
Connect the air track to the pump and turn it on. Insert the magnetic attachments into the gliders and softly collide them. Magnets with similar polarity will repel (elastic collision) while those with opposite polarity with attract (inelastic collision).

==Keywords==
air, track, friction-less, collision, magnet, glider, motion, detector, sensor

==Images & Movies==
<gallery>
File:1H10.90_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=gBiaCylAq7k}}

Glider with magnets

2015-08-28T14:53:58Z

Mwong017: /* Images & Movies */

Basketball with tennis ball

2015-08-28T14:52:53Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[1N_-_Linear_Momentum_and_Collisions|1N - Linear Momentum and Collisions]] 
PIRA index: 1N30.60

==Description==
A tennis ball is sitting atop a basketball and both balls are dropped. A large recoil force from the basketball launches the tennis ball high in the air shortly after impact.

==Equipment==
*Basketball
*Tennis ball

==Instructions==
Have the tennis ball directly above and touching the basketball. Drop both balls from waist-height.

==Keywords==
basketball, drop, tennis, ball

==Images & Movies==
<gallery>
File:1C20.15_1.JPG|Figure1
</gallery>
{{#widget:YouTube|id=7cy28yzRr58}}

Center of mass of irregular objects

2015-08-28T14:51:53Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1J_-_Statics_and_Rigid_bodies|1J - Statics and Rigid bodies]] 
PIRA index: 1J20.20

==Description==
The center of mass of irregular objects is used to balance these objects in precarious positions.

==Equipment==
*utensils and glass
*eagle and cone

==Instructions==
Balance the utensils arrangement on the edge of the glass. Balance the eagle's beak on the tip of the inverted cone.

==Keywords==
center, mass, irregular, object

==Images & Movies==
<gallery>
File:1J20.20_correct.jpg|Figure1
</gallery>
{{#widget:YouTube|id=SRnY69_LPYw}}

Light tube rotation

2015-08-28T14:50:45Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1D_-_Motion_in_two_dimensions|1D - Motion in two dimensions]] 
PIRA index: 1D40.00

==Description==
A tube with two LEDs is thrown and spun in the air. The red LED is at the tube's center of mass while the yellow LED is at the end. When thrown and spun, the red LED's trajectory is a parabola.

==Equipment==
*Light tube

==Instructions==
Throw the light tube in the air such that it rotates rapidly, end over end. The red LED at the center of mass of the tube will appear to fly in a parabolic pattern.

==Keywords==
light tube, center of mass, rotation

==Images & Movies==
<gallery>
File:1D40.00_2.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=IeR9XWvOXCs}}

Rotational dynamics pulleys

2015-08-28T14:49:25Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[1Q_-_Rotational_Dynamics|1Q - Rotational Dynamics]] 
PIRA index: 1Q20.25

==Description==
Large and small pullies demonstrate rotational properties such as velocity, acceleration, and torque.

==Equipment==
*rod attachment
*solid pulley
*mass and string

==Instructions==
Attach the pulley to the rod such that it will rotate vertically. Attach the mass to the pulley using string and allow it to fall thus rotating the pulley. The mass will not lift as high as before.

==Keywords==
rotational, dynamics, pulley, angular, velocity, acceleration, torque

==Images & Movies==
<gallery>
File:1Q20.25_1.JPG|Figure1
File:1Q20.25_2.JPG|Figure2
</gallery>
{{#widget:YouTube|width=600|height=337|id=dhwu5z_dKbs}}

Large yo-yo

2015-08-28T14:47:26Z

Mwong017: /* Images & Movies */

__NOTOC__
Back to [[1M_-_Work_and_Energy|1M - Work and Energy]] 
PIRA index: 1M40.50

==Description==
A yo-yo is shown to roll either forwards or backwards depending on the angle at which its tape is pulled.

==Equipment==
*large yo-yo

==Instructions==
Pull the yo-yo's tape at different angles. Note the direction that the yo-yo's tape is facing.

==Keywords==
yoyo, roll, pull, black, tape, angle

==Images & Movies==
<gallery>
File:1M40.50_1.JPG|Figure1
</gallery>
{{#widget:YouTube|width=600|height=337|id=Jy5v2u9Jk7o}}

Bicycle wheel as gyroscope

2015-08-28T14:45:55Z

Mwong017: /* Images & Movies */

Water whirlpool

2015-08-28T14:44:41Z

Mwong017: /* Images & Movies */

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Back to [[2C_-_Dynamics_of_fluids|2C - Dynamics of fluids]] 
PIRA index: 2C50.30

==Description==
A "water-wheel" (turbine) attached to a drill is used to generate a whirlpool in a bucket of water sitting atop the rotateable platform. The platform will begin to rotate due to conservation of angular momentum.

==Equipment==
*turbine attachment
*cordless drill
*bucket filled with water
*rotateable platform

==Instructions==
Place bucket filled with water on the rotateable platform. Create a whirlpool by spinning the water-wheel (turbine) inside the water while holding the platform steady. When the whirlpool has sufficient velocity, remove the water-wheel.

==Keywords==
water, wheel, watermill, turbine, drill, whirlpool, bucket, rotation, rotateable, platform, conservation, angular, momentum

==Images & Movies==
<gallery>
File:2C50.30_1.JPG|Figure1
</gallery>
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Briefcase with flywheel inside

2015-08-28T14:43:33Z

Mwong017: /* Images & Movies */

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Back to [[1Q_-_Rotational_Dynamics|1Q - Rotational Dynamics]] 
PIRA index: 1Q50.40

==Description==
A spinning disc hidden inside a briefcase is spun rapidly. The briefcase is then rotated slowly to show how it responds to the angular momentum of the disc. The disc is also known as a flywheel.

==Equipment==
*briefcase
*cordless drill with drill bit

==Instructions==
Use the drill to rapidly rotate the flywheel hidden inside the briefcase. Hand the briefcase to a student and have the student rotate it back and forth and demonstrate its dependence on angular momentum.

==Keywords==
flywheel, briefcase, drill

==Images & Movies==
<gallery>
File:1Q50.40_1.JPG|Figure1
File:1Q50.40_2.JPG|Figure2
</gallery>
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Cylinder race down a ramp

2015-08-28T14:41:39Z

Mwong017: /* Images & Movies */

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Back to [[1Q_-_Rotational_Dynamics|1Q - Rotational Dynamics]] 
PIRA index: 1Q10.40

==Description==
The size, weight, and mass distribution of a cylinder influences its moment of inertia and determines the speed at which it will roll down a ramp.

==Equipment==
*inclined race track
*different cylinders

==Instructions==
Place the two contestants at the top of the track behind the stopper. Lift the stopper to start the race.

Possible match-ups are

1) cylinders have the same mass but one is solid and the other is hollow.

2) cylinders have the same shape but different masses.

3) cylinders have the diameter but one is solid and the other is hollow.

4) cylinders have the same diameter and mass but their mass distribution is different (one central and one around the edge).

==Keywords==
incline, plane, ramp, cylinder, race, roll, moment of inertia

==Images & Movies==
<gallery>
File:1Q10.40_1.JPG|Figure1
File:1Q10.40_2.JPG|Figure2
</gallery>
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Mass on a spring

2015-08-28T14:40:24Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[3A_-_Oscillations|3A - Oscillations]] 
PIRA index: 3A20.10

==Description==
An oscillating mass on a spring demonstrates simple harmonic motion.

==Equipment==
*mass on a spring
*rod attachment

==Instructions==
Get the mass oscillating slowly. The period of oscillation should not change significantly.

==Keywords==
mass, spring, oscillation, simple harmonic motion

==Images & Movies==
<gallery>
File:3A20.10_2.JPG|Figure1
</gallery>
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Mass on a spring

2015-08-28T14:40:09Z

Mwong017: /* Keywords */

Mass on a spring

2015-08-28T14:39:52Z

Mwong017: /* Description */

__NOTOC__

Back to [[3A_-_Oscillations|3A - Oscillations]] 
PIRA index: 3A20.10

==Description==
An oscillating mass on a spring demonstrates simple harmonic motion.

==Equipment==
*mass on a spring
*rod attachment

==Instructions==
Get the mass oscillating slowly. The period of oscillation should not change significantly.

==Keywords==
mass, spring, oscillation

==Images & Movies==
<gallery>
File:3A20.10_2.JPG|Figure1
</gallery>

Ping-pong ball on spinning platform

2015-08-28T14:38:51Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[3A_-_Oscillations|3A - Oscillations]] 
PIRA index: 3A40.10

==Description==
A ping-pong ball attached to the edge of a spinning platform traces out a circle when viewed from the side. When its shadow is viewed from the front, the ball appears to oscillate in simple harmonic motion.

==Equipment==
*rotating platform with ping-pong ball
*overhead projector

==Instructions==
Place the spinning platform on the overhead projector. The class should be able to see the circular motion from the apparatus itself but see the simple harmonic motion from the overhead projector.

==Keywords==
simple harmonic motion, ping pong ball, oscillation, shadow, spinning, rotating

==Images & Movies==
<gallery>
File:3A40.10_1.JPG|Figure1
</gallery>
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Ping-pong ball on spinning platform

2015-08-28T14:37:45Z

Mwong017: /* Keywords */

Simple pendulum

2015-08-28T14:37:00Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[3A_-_Oscillations|3A - Oscillations]] 
PIRA index: 3A10.10

==Description==
A small mass on a string acts as a simple pendulum. The length of the string can be adjusted to change the period of oscillation.

==Equipment==
Various setups:

*mass on a string
*physical pendulum
*mass on a string with length measurement

==Instructions==
Hold the string and swing the pendula back and forth to demonstrate oscillations and simple harmonic motion. You can change the length of string to change the period of oscillation.

==Keywords==
simple pendulum, string, oscillation

==Images & Movies==
<gallery>
File:3A10.10_1.JPG|Figure1
File:3A10.10_2.JPG|Figure2
File:3A10.10_3.JPG|Figure3
File:3A10.10_4.JPG|Figure4
</gallery>
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Simple pendulum

2015-08-28T14:35:55Z

Mwong017: /* Images & Movies */

Oscillation of liquid in a tube

2015-08-28T14:33:53Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[3A_-_Oscillations|3A - Oscillations]] 
PIRA index: 3A50.70

==Description==
Tonic water in a U-shaped tube is illuminated by a black light. If the water is displaced to one side, it will oscillate back and forth in simple harmonic motion (SHM).

==Equipment==
*clear rubber tube
*rod and clamp holders
*quinine liquid
*black light

==Instructions==
Attach the tube using the clamp holders such that it forms a U-shape. Partially fill the tube with quinine. The quining will glow under black light. Begin the oscillation by blowing into one tube or simply lifting it quickly then returning it to rest position.

==Keywords==
oscillation, liquid, u shape, flexible tube, simple harmonic motion, SHM

==Images & Movies==
<gallery>
File:3A50.70_1.JPG|Figure1
</gallery>
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Rigid pendulum

2015-08-28T14:32:24Z

Mwong017: /* Images & Movies */

__NOTOC__

Back to [[3A_-_Oscillations|3A - Oscillations]] 
PIRA index: 3A15.20

==Description==
A ruler with different slots (to adjust height) acts as a rigid pendulum. A rod with a mass on its end can also act as a rigid pendulum.

==Equipment==
*rigid pendulum (ruler or bar)
*rod attachment

==Instructions==
Connect the rigid pendulum to the rod attachment. Shift the pendulum to a small angle from vertical and allow it to oscillate and demonstrate simple harmonic motion.

==Keywords==
adjustable, rigid pendulum, period, oscillation

==Images & Movies==
<gallery>
File:3A15.20_1.JPG|Figure1
File:3A15.20_2.JPG|Figure2
</gallery>
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Rigid pendulum

2015-08-28T14:31:07Z

Mwong017: /* Images & Movies */