# Needs New Photo

## B3-02: LEVERS - THREE CLASSES

Category: B3 Simple Machines
Purpose: Demonstrate the three classes of levers

## B3-01: LEVER AND LOADED WAGON

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

## B2-43: CRANE BOOM

Purpose: Demonstrate a crane boom

## B2-42: ARM MODEL

Purpose: Model the forces occurring in the arm

## B2-36: EQUILIBRIUM OF TORQUES ON METERSTICK - ROTATORS

Purpose: Demonstrate equilibrium of torques

## B2-35: EQUILIBRIUM OF TORQUES ON METERSTICK

Purpose: Demonstrate equilibrium of torques

## B2-34: EQUILIBRIUM OF TORQUES - ANGLE BRACKET

Purpose: Verify the equation for torques when the center of mass is outside the object

## B2-33: EQUILIBRIUM OF TORQUES - SMALL

Purpose: Demonstrate equilibrium of torques

## B2-31: EQUILIBRIUM OF TORQUES - WHEELS AND AXLES

Purpose: Demonstrate equilibrium of torques

## B2-21: CONCEPT OF TORQUE - TORSIONAL CHAIR

Purpose: Introduce the concept of torque

## 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

## B2-11: EQUILIBRIUM OF FORCES - OHAUS PROJECTION

Purpose: Demonstrate equilibrium of forces

## B2-04: VERTICAL FORCES - FOUR SPRING SCALES

Purpose: Show addition of forces along a line

## B2-03: EQUILIBRIUM OF FORCES - INCLINED PLANE

Purpose: Demonstrate equilibrium of forces

## B2-02: SUM OF FORCES - SPRING SCALES

Purpose: Show that the sum of forces exerted on the mass by the scales is constant

## B2-01: SUM OF FORCES IN A LINE

Purpose: Demonstrate that forces in one dimension add algebraically

## B1-24: CENTER OF MASS - CARTS ON BALANCE BOARD

Purpose: Show that the center of mass may remain at rest during motion within the system.

## B1-22: CENTER OF GRAVITY USING TEETER TOTTER

Purpose: Determine the center of gravity of the human body

## B1-21: BALANCE BEAM - VARIATION ON THE TIGHTROPE WALKER

Purpose: Show how arms or a pole are used to obtain greater stability
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• #### 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
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