# 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.
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• #### C3-01: INERTIA - SMALL STEEL BALL

Demonstrate inertia of rest Read More

• #### C3-04: INERTIA - LEAD BRICK AND HAND

Illustrates inertia of rest Read More

• #### C3-06: INERTIA: JENGA

Demonstrate inertia of rest. Read More
• #### C3-11: STRAW AND POTATO

Illustrate inertia of motion Read More