# Needs New Photo

## C7-16: HAPPY AND UNHAPPY BALLS

Category: C7 Collisions
Purpose: Illustrate coefficient of restitution.

## C7-04: AIR TRACK - COLLISION VELOCITY MULTIPLIER

Category: C7 Collisions
Purpose: Illustrate velocity multiplication with a three-to-one mass ratio collision.

## C7-03: AIR TRACK - SCATTERING WITHOUT CONTACT

Category: C7 Collisions
Purpose: Show that elastic scattering can occur between two objects without actual physical contact between the objects.

## C7-02: AIR TRACK -INELASTIC COLLISIONS

Category: C7 Collisions
Purpose: Demonstrate conservation of momentum in elastic collisions.

## C7-01: AIR TRACK - ELASTIC COLLISIONS

Category: C7 Collisions
Purpose: Demonstrate conservation of energy and conservation of momentum in elastic collisions.

## C8-34: POWER - INSTRUCTOR DRAGGING CONCRETE BLOCK

Purpose: Demonstrate power

## C8-33: POWER - USING GRAVITY

Purpose: Demonstrate mechanical power.

## C8-32: POWER - CLIMBING LADDER

Purpose: A simple method for illustrating power and the unit of the horsepower.

## C8-23: WORK DONE BY PUSHING ON WALL

Purpose: Illustrates that the wall and the floor do no work.

## C8-13: BUNGEE JUMPER MODEL

Purpose: Determine the minimum value of the spring constant of a bungee rope to ensure a safe jump.

## C8-12: JUMPING MASSES WITH INTERNAL SPRINGS

Purpose: Demonstrate conversion of internal energy of a spring into kinetic energy and then gravitational potential energy.

## C8-05: CONSERVATION OF ENERGY IN VERTICAL PROJECTILE

Purpose: Show the relation between initial velocity and height of a vertical projectile.

## C6-16: SLIDING AND STATIC FRICTION

Category: C6 Friction
Purpose: Show that the friction force depends linearly on the normal component of the applied force.

## C6-15: SOCIAL DESCENDER - FRICTION TOY

Category: C6 Friction
Purpose: Illustrate frictional forces in a weird way.

## C6-14: SOCIAL CLIMBER

Category: C6 Friction
Purpose: Illustrate frictional forces in a weird way.

## C6-12: SKIDDING AUTOMOBILE

Category: C6 Friction
Purpose: Demonstrate the effect of locked wheels on vehicle stability.

## C6-11: SLIDING FRICTION - LECTURE TABLE AND FELT

Category: C6 Friction
Purpose: Show the effect on frictional force of velocity, normal force, and contact area.

## C6-05: AIR TRACK - INCLINED PLANE FRICTION

Category: C6 Friction
Purpose: Show that the force of friction depends upon the conditions of the surfaces in contact.

## C6-04: FRICTION DIRECTION ON INCLINED PLANE

Category: C6 Friction
Purpose: Determine the direction of the frictional force in a possibly ambiguous situation.

## N2-09: SPECTROPHOTOMETER

Category: N2 Line Spectra
Purpose: Show how a spectrophotometer works.
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• #### C7-01: AIR TRACK - ELASTIC COLLISIONS

Demonstrate conservation of energy and conservation of momentum in elastic collisions Read More
• #### C7-02: AIR TRACK -INELASTIC COLLISIONS

Demonstrate conservation of momentum in elastic collisions Read More
• #### C7-03: AIR TRACK - SCATTERING WITHOUT CONTACT

Show that elastic scattering can occur between two objects without actual physical contact between the objects Read More
• #### C7-04: AIR TRACK - COLLISION VELOCITY MULTIPLIER

Illustrate velocity multiplication with a three-to-one mass ratio collision Read More
• #### C7-11: COLLISIONS OF BALLS - EQUAL MASSES

Demonstrates conservation of energy and conservation of linear momentum in multiple elastic collisions Read More
• #### C7-12: COLLISION OF BALLS - ONE LIGHTER MASS

Show what happens when one mass in a collision ball set is different from the others Read More
• #### C7-13: COLLISIONS OF BALLS - GRADUATED MASSES

Demonstrate how the velocity is multiplied by a sequence of collisions between balls of decreasing mass Read More
• #### C7-14: COLLISIONS OF BALLS WITH FLOOR

Illustrate collisions of different balls with the floor Read More
• #### C7-15 COLLISIONS OF BALLS - 3 TO 1 MASS RATIO

Shows velocity multiplication in colliding balls Read More
• #### C7-16: HAPPY AND UNHAPPY BALLS

Illustrate coefficient of restitution Read More
• #### C7-17 SUPERBALL

Illustrates nearly elastic collisions Read More
• #### C7-18 COLLISIONS OF BALLS - ASTROBLASTER

Shows velocity multiplication in colliding balls Read More
• #### C7-19: GAUSSIAN GUN

Demonstrate transfer of energy in an elastic collision Read More
• #### C7-21: ENERGY AND MOMENTUM - COLLISION AND PROJECTILE

Illustrate conservation of momentum and conservation of energy Read More
• #### C7-23: MEDICINE BALL AND SKATEBOARD

Demonstrate large-scale collisions Read More
• #### C7-24: SILLY PUTTY

Show collisions with an unusual material Read More
• #### C7-25: SUPERBALL, VACUUM MUD AND WOOD BLOCK COLLISIONS

Show that a larger impulse is imparted by an elastic collision Read More
• #### C7-26: BOUNCING PUTTY AND NON-BOUNCING SUPERBALL

Show unusual collisions Read More
• #### C7-42: AIR TABLE - COLLISIONS OF PUCKS

Qualitatively demonstrate elastic and inelastic two-dimensional collisions Read More
• #### C7-43: AIR TABLE - SMALL - COLLISIONS OF PUCKS

Demonstrate collisions of pucks on an air table in rooms not accessible by the large air table Read More
• #### C7-44: COLLISIONS - HOVERPUCKS

Demonstrate two-dimensional collisions Read More
• #### C7-51: BALLISTIC PENDULUM - PELLET GUN

Determine the speed of an air gun pellet using a ballistic pendulum Read More
• #### C7-52: BALLISTIC PENDULUM - LABORATORY MODEL

Demonstrate operation of the standard laboratory type ballistic pendulum Read More
• #### C7-53: AIR TRACK - SPEED OF AIR GUN PELLET

Determine the speed of an air gun pellet using conservation of momentum in an inelastic collision Read More
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