# 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
• #### B4-01 HOOKE'S LAW

Demonstrate the linear relationship between force and stretching for a simple spring. Read More
• #### B4-02: HOOKE'S LAW - COMPRESSING A SPRING

Demonstrate Hooke's law for a spring under compression. Read More
• #### B4-03: SPRINGS IN SERIES AND PARALLEL

Show static combinations of springs Read More
• #### B4-04: SPRING AND STRING THING

Illustrate series and parallel springs in a counterintuitive way. Read More
• #### B4-11: ELASTIC LIMIT OF RUBBER BAND

Demonstrate Hooke's law and elastic limit. Read More
• #### B4-12: ELASTIC LIMIT OF SOLDER SPRING

Demonstrate the elastic limit for an inherently inelastic object. Read More
• #### B4-13: ELASTIC LIMIT OF A BALLOON

Burst a balloon. Read More
• #### B4-14: ELASTIC LIMIT OF WIRE

Demonstrate the variation in tensile strength with wire diameter. Read More
• #### B4-21: DEFLECTION OF BEAM - OPTICAL LEVER

Demonstrate the small deflection of an aluminum beam due to weighting between supports. Read More
• #### B4-31: FAILURE OF WOOD IN COMPRESSION

Demonstrate the dependence of the compressional strength of wooden dowels on their diameter and length. Read More
• #### B4-32: CAN CRUSHER - WALL STABILITY

Show how a small change in the geometry of the can wall can dramatically affect its ability to support a Read More
• #### B4-33: EGG CRUSHER

Show that an egg can support unexpectedly high forces due to its curved shape. Read More
• 1