# Needs New Photo

## B1-17: CENTER OF MASS - STICKS

Purpose: Illustrate the center of mass in a surprising way

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

Purpose: Illustrate the center of mass in a surprising way

## B1-11: BALANCE MAN

Purpose: Illustrate stable equilibrium

## B1-09: CENTER OF MASS - TRIANGLE

Purpose: Demonstrate the process of locating the center of mass

## B1-07: DOUBLE CONE - SMALL

Purpose: Demonstrate a center of mass paradox

## A2-32: HEIGHT MEASUREMENT BY TRIGONOMETRY

Category: A2 Mathematics
Purpose: Determine the height of a student using trigonometry

## A2-23: VECTOR PRODUCT

Category: A2 Mathematics
Purpose: Illustrate the product of two vectors

## A2-21: MAGNETIC VECTOR BOARD

Category: A2 Mathematics
Purpose: Demonstrate properties of vectors

## A2-15: HYPERBOLOID FROM STRAIGHT LINES

Category: A2 Mathematics
Purpose: Approximate the hyperboloid

## A2-12: SLATED SPHERE

Category: A2 Mathematics
Purpose: Demonstrate rotation and spherical geometry

## A2-11: CIRCUMFERENCE VS. DIAMETER - CHAIN ON CYLINDER

Category: A2 Mathematics
Purpose: Show the relationship between the diameter and the circumference of a circle

## A2-02: XYZ AXES ON EXTENDED HANDLE

Category: A2 Mathematics
Purpose: Aid in discussing angular momentum

## A2-01: CARTESIAN COORDINATE AXES

Category: A2 Mathematics
Purpose: Illustrate a standard right-handed cartesian coordinate system

## D5-13: FOCAULT PENDULUM - MODEL

Purpose: Model the Foucault pendulum

## O1-01: EYE MODEL - OPTICS

Purpose: Demonstrates optics of the eye and corrections of optical defects

## L3-16 FOCUSING OF HEAT WAVES BY MIRRORS

Category: L3 Curved Mirrors
Purpose: Demonstrates that concave mirrors can focus heat waves

## K2-03 FARADAY'S EXPERIMENT ON INDUCTION

Purpose: Demonstrates the induction between two coils

## H4-04 FOURIER ANALYSIS - DIGITAL OSCILLOSCOPE

Category: H4 Music
Purpose: Demonstrates the Fourier spectrum of complex waves

## G3-53 STANDING WAVES IN A STRING

Purpose: Demonstrates standing waves on a thin string

## D1-61: Rolling versus Sliding

Purpose: Applies conservation of energy to a rolling object
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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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