# Rotational Dynamics

## D2-51: BICYCLE WHEEL PENDULUM

Purpose: Demonstrate the Parallel Axis Theorem.

## D2-43: MOMENT OF INERTIA - TORSIONAL CHAIR AND WEIGHTS

Purpose: Demonstrate the effect of moment of inertia.

## D2-42: MOMENT OF INERTIA -TORSIONAL CHAIR AND BOARD

Purpose: Demonstrate moment of inertia using the torsional chair.

## D2-41: MOMENTS OF INERTIA ABOUT THREE PRINCIPAL AXES

Purpose: Illustrate the three principal axes of a thin aluminum plate.

## D2-32: AIR TABLE - LINEAR AND ANGULAR ACCEL OF A DISC

Purpose: Illustrate the accelerating disc problem.

## D2-21: CENTER OF PERCUSSION - BAT AND MALLET

Purpose: Demonstrate the center of percussion using a baseball bat.

## D2-13: RACING PENDULA

Purpose: Illustrate in a counter-intuitive way the effect of moment of inertia on rotational acceleration.

## D2-12: TOPPLING CHIMNEY

Purpose: Demonstrate how a toppling chimney breaks up.

## D2-11: HINGED STICK AND FALLING BALL

Purpose: Application of the rotational analog of Newton's second law.

## D2-05: DUMBBELL - VARIABLE MOMENT OF INERTIA

Purpose: Demonstrate the effect of moment of inertia.

## D2-04: MOMENT OF INERTIA RODS

Purpose: Demonstrate dynamic effects of the center of mass and moment of inertia

## D2-03: CANS ON INCLINED PLANE - WITH AND WITHOUT WATER

Purpose: Illustrate the effect of moment of inertia on rolling acceleration.

## D1-84: SPINNING CYLINDRICAL SHELL

Purpose: A counterintuitive demonstration of rotational dynamics.

## D1-83: SPOOL

Purpose: Illustrate a counterintuitive problem in rotational dynamics.

## D1-82: ROLLING FRICTION

Purpose: Show the direction of the frictional force when a rolling object is accelerated.

## D1-81: TRICYCLE

Purpose: Illustrate a tricky problem in rotational dynamics.

## D1-65: YO-YO

Purpose: Illustrate transformation between various forms of energy and to perform yo-yo tricks.

## D1-64: MAXWELL PENDULUM - SMALL

Purpose: Demonstrate transformations between gravitational potential energy and rotational kinetic energy.

## D1-63: MAXWELL PENDULUM - LARGE

Purpose: Demonstrate transformations between gravitational potential energy and rotational kinetic energy.

## D1-62: CONSERVATION OF ENERGY IN ROLLING BODY

Purpose: Demonstrate conversion of gravitational potential energy into translational and rotational kinetic energy.
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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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