# Newton's Third Law

## C7-19: GAUSSIAN GUN

Category: C7 Collisions
Purpose: Demonstrate transfer of energy in an elastic collision

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

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

## G1-18: PENDULUM WITH FORCE SCALE

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

## 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.

## C5-51: BALLISTOCARDIOGRAPHY

Purpose: Demonstrate the science of ballistocardiography

## C5-41: HOURGLASS PROBLEM

Purpose: Demonstrate the solution to the famous "hourglass problem," or Galileo's water bucket

## C5-31: AIR TRACK - SAILING UPWIND

Purpose: Show how force components can be used to sail against the wind.

## C5-20: PUTT PUTT STEAM BOAT

Purpose: Demonstrate action-reaction using an intriguing device.

## C5-16: HERO'S ENGINE

Purpose: Demonstrate action and reaction in a rotational system.

## C5-15: REACTION FORCE ON AIR BLOWER

Purpose: Demonstrate Newton's third law of motion

## C5-12: BALLISTIC CANNON CARTS

Purpose: Demonstrate Newton's third law of motion

## C5-11: AIR TRACK - ACTION-REACTION PAIRS

Purpose: Demonstrate Newton's third law of motion

## C5-01: NEWTON'S THIRD LAW - STATIC DYNAMOMETERS

Purpose: Demonstrate action-reaction in the static case

## C4-11: ACCELEROMETER - BALL IN WATER

Purpose: Demonstrate the direction of acceleration for both linear and circular cases.

## B3-14: EQUILIBRIUM PARADOX - SCALES AND PULLEY

Category: B3 Simple Machines
Purpose: Counterintuitive demonstration involving pulley system

## B3-03: LEVER - WRECKING BAR

Category: B3 Simple Machines
Purpose: Demonstrate the mechanical advantage of a lever

## B2-16: VECTOR ADDITION WITH ROPE AND STUDENTS

Purpose: Demonstrate vector addition of forces

## B2-14: SUM OF FORCES - LARGE ROPE VERSION

Purpose: Develop a feel for equilibrium of forces on a large scale

## B2-12: EQUILIBRIUM OF FORCES - BOARD BACKGROUND

Purpose: Demonstrate equilibrium of forces
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• #### B1-01 CENTER OF MASS - DISC SECTION

Demonstrate finding center of mass for an irregularly-shapped object Read More
• #### B1-02: CENTER OF MASS - LEANING TOWER

Demonstrate the effect of center of mass location Read More
• #### B1-03: CENTER OF MASS - LEANING TOWER ON INCLINED PLANE

Demonstrate equilibrium when its center of mass is above its base Read More
• #### B1-04: Center of Mass - Brass Barbell

Demonstrate stable equilibrium when supported at center-of-mass Read More
• #### B1-05: CENTER OF MASS - PLUMBER'S HELPER

Locate the center of mass of an irregular object Read More

• #### B1-08: STATES OF EQUILIBRIUM - CONE

Illustrate stable, unstable, and neutral equilibrium Read More
• #### B1-09: CENTER OF MASS - TRIANGLE

Demonstrate the process of locating the center of mass Read More

• #### B1-12: CENTER OF MASS - HINGED STICK PARADOX

Illustrate the center of mass in a surprising way Read More
• #### B1-13: CENTER OF MASS - FORK AND SPOON ON TOOTHPICK

Illustrate the center of mass in a surprising way Read More
• #### B1-14: CENTER OF MASS - BOTTLE

Illustrate the center of mass in a surprising way Read More
• #### B1-15: TOPPLING CYLINDERS

Illustrate stable and unstable equilibrium in a surprising way Read More
• #### B1-16: CORBELED ARCH

Illustrate how the center of mass affects the stability of an arch Read More
• #### B1-17: CENTER OF MASS - STICKS

Illustrate the center of mass in a surprising way Read More
• #### B1-18: Center of Mass - Soda Can and Water

Show how moving the center of mass of an object changes how it balances. Read More
• #### B1-21: BALANCE BEAM - VARIATION ON THE TIGHTROPE WALKER

Show how arms or a pole are used to obtain greater stability Read More
• #### B1-22: CENTER OF GRAVITY USING TEETER TOTTER

Determine the center of gravity of the human body Read More
• #### B1-24: CENTER OF MASS - CARTS ON BALANCE BOARD

Show that the center of mass may remain at rest during motion within the system Read More
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