# Needs New Photo

## G1-36: MASS ON SPRING WITH FORCE MEASUREMENT

Purpose: Display the time dependence of the force of a mass oscillating on a spring.

## G1-35: MASS ON SPRING - EFFICIENT MODEL

Purpose: Illustrate the motion of a mass on a spring.

## G1-34: AIR TRACK - SIMPLE HARMONIC MOTION

Purpose: Demonstrate simple harmonic motion of a mass held by two springs.

## G1-32: MASS ON SPRING - WITH STAND

Purpose: Illustrate SHM.

## G1-31: HOOKE'S LAW AND SHM

Purpose: Quantitatively demonstrate how the spring constant affects the period of a mass on a spring.

## G1-18: PENDULUM WITH FORCE SCALE

Purpose: Show the tension in the string exerted by a swinging pendulum.

## G1-17: PENDULUM WITH LARGE-ANGLE OSCILLATION - PORTABLE

Purpose: Illustrate large-angle pendular oscillations and the 360 degree pendulum.

## F4-63: MARIOTTE'S BOTTLE

Category: F4 Fluid in Motion
Purpose: Show the range of water jets from different heights along a water column.

## G1-16: PENDULUM WITH LARGE OSCILLATION

Purpose: Show the difference between pendula with small amplitude and large amplitude of oscillation, and to show rotational motion where the kinetic energy at the top is much less than the change of potential energy from the top to the bottom of the oscillation.

## G1-12: PENDULUM AND ROTATING BALL

Purpose: Demonstrate that simple harmonic motion is the projection of uniform circular motion.

## F4-61: HERO'S FOUNTAIN

Category: F4 Fluid in Motion
Purpose: Illustrate fluid dynamics in a perhaps surprising way.

## F4-52: FORCE PUMP - MODEL

Category: F4 Fluid in Motion
Purpose: Demonstrate the operation of a force pump.

## F4-42: SMOKE RINGS USING GARBAGE CAN

Category: F4 Fluid in Motion
Purpose: Create large smoke rings and illustrate the circular vortex.

## F4-41: DRUM AND CANDLE

Category: F4 Fluid in Motion
Purpose: Demonstrate the circular vortex.

## F4-23: WATER PENDULUM

Category: F4 Fluid in Motion
Purpose: Show the surface of a container of water in a swinging pendulum.

## F4-22: SPINNING WATER BUCKET

Category: F4 Fluid in Motion
Purpose: Illustrate the reaction force on spinning water and the shape of the water surface.

## F4-21: LIQUID IN SPINNING SPHERE

Category: F4 Fluid in Motion
Purpose: Show the behavior of a liquid when subjected to a centripetal force.

## F4-14: WIND TUNNEL

Category: F4 Fluid in Motion
Purpose: Show air flow around different objects.

## F4-05: PARACHUTE TOY

Category: F4 Fluid in Motion
Purpose: Demonstrate how a parachute quickly reaches its terminal velocity.

## F4-02: VISCOSITY OF AIR

Category: F4 Fluid in Motion
Purpose: Demonstrate that air is viscous.
Page 9 of 21
• #### D1-01 STROBOSCOPE AND FAN

Demonstrates rotational motion using stroboscope Read More

• #### D1-12: ADDITION OF ANGULAR VELOCITIES

Illustrate the complex motion resulting from addition of two angular velocities Read More
• #### D1-21: ANGULAR VELOCITY - OBERBECK CROSS

Measure the angular velocity of a rotating object Read More
• #### D1-30: TRAJECTORY FROM CIRCULAR ORBIT - OVERHEAD PROJECTOR

Show that the instantaneous velocity of an object executing uniform circular motion is tangent to the circle Read More
• #### D1-31: TRAJECTORY FROM SPIRAL

Show that forces are required to create circular motion Read More
• #### D1-32: TRAJECTORY FROM CIRCULAR ORBIT

Show that the instantaneous velocity of an object executing uniform circular motion is tangent to the circle Read More
• #### D1-33 ROTATING MASS ON STRING

Illustrates centripetal force and that instantaneous velocity is tangent to the circular path Read More

• #### D1-35 CENTRIPETAL FORCE - ROTATING MASS

Measures the required centripetal force for an object to move with uniform circular motion Read More
• #### D1-36: AIR TABLE - CENTRIPETAL FORCE

Show that centripetal force varies with angular velocity Read More
• #### D1-37 MUDSLINGER

Illustrates centripetal force and that instantaeous velocity is tangent to the circular path Read More
• #### D1-39: PENNY AND COAT HANGER

Demonstrate centripetal force and centrifugal reaction in a dramatic way Read More
• #### D1-40: CENTRIPETAL FORCE ON ROTATING RUBBER BAND

Demonstrate centripetal force and centrifugal reaction Read More
• #### D1-41 ROTATING WATER BUCKET

Demonstrates centripetal force and centrifugal reaction Read More
• #### D1-42: ROTATING WATER BUCKET WITH SPONGE

Illustrate centripetal force and centrifugal reaction with a trick Read More
• #### D1-43: INERTIAL FORCES - BALLS IN ROTATING JARS

Demonstrate inertial forces in bodies submerged in air and in water Read More
• #### D1-44: ACCELEROMETERS AND FRAMES OF REFERENCE

Demonstrate the direction of the acceleration in both rotational and translational coordinate systems Read More
• #### D1-51 BANKED CURVE MODEL

Aid in explaining banked turns Read More
• #### D1-52: FAIRGROUND ROTOR

Illustrate the application of rotational forces Read More
• #### D1-53 LOOP-THE-LOOP

Demonstrates conservation of energy in a rotating object and centripetal force Read More
• #### D1-55: ROTATING ELASTIC RINGS

Demonstrate "centrifugal reaction" and to indicate why the earth is oblate Read More
• #### D1-61: Rolling versus Sliding

Applies conservation of energy to a rolling object Read More
• #### D1-62: CONSERVATION OF ENERGY IN ROLLING BODY

Demonstrate conversion of gravitational potential energy into translational and rotational kinetic energy Read More
• #### D1-63: MAXWELL PENDULUM - LARGE

Demonstrate transformations between gravitational potential energy and rotational kinetic energy Read More
• #### D1-64: MAXWELL PENDULUM - SMALL

Demonstrate transformations between gravitational potential energy and rotational kinetic energy Read More
• #### D1-65: YO-YO

Illustrate transformation between various forms of energy and to perform yo-yo tricks Read More
• #### D1-81: TRICYCLE

Illustrate a tricky problem in rotational dynamics Read More
• #### D1-82: ROLLING FRICTION

Show the direction of the frictional force when a rolling object is accelerated Read More
• #### D1-83: SPOOL

Illustrate a counterintuitive problem in rotational dynamics Read More
• #### D1-84: SPINNING CYLINDRICAL SHELL

A counterintuitive demonstration of rotational dynamics Read More
• 1