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# Kinetic Energy Ball Drop—Demonstration Kit

Item #: AP7187

Price: \$23.99

In Stock.

With the Kinetic Energy Ball Drop Demonstration Kit for physical science and physics, demonstrate the relationship between speed and kinetic energy by dropping a ball from two different heights.

## Product Details

Will a ball traveling twice as fast as another ball of the same mass really have four times the kinetic energy? Demonstrate the relationship between speed and kinetic energy by dropping a ball from two different heights onto a bed of soft clay. For the second drop, the ball is traveling twice as fast, and it forms a crater four times as deep, indicating that the energy is proportional to the square of the ball’s speed. After the demonstration, the clay can be removed from the mold and then cut in half along the crater marks to measure and compare the depth of the craters. All the materials are completely reusable. Detailed instructions, historical background information and student worksheet are provided.

Concepts: Kinetic energy, potential energy, inelastic collisions.
Time Required: 15 minutes
Note: The clay must be heated to soften it. A laboratory microwave offers the quickest method, but a ceramic hot plate will work too.

## Specifications

Materials Included in Kit:
Clay, terra cotta, ¼ lb pkg, 3
Half-circle rings, PVC, gray, 3½" o.d. x ⅞" thick, pkg/2
Steel ball, solid, ¾"
Zipper top bag, 9" x 12"

## Correlation to Next Generation Science Standards (NGSS)†

### Science & Engineering Practices

Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Using mathematics and computational thinking
Engaging in argument from evidence

### Disciplinary Core Ideas

MS-PS3.B: Conservation of Energy and Energy Transfer
MS-PS3.C: Relationship between Energy and Forces
HS-PS2.A: Forces and Motion
HS-PS3.A: Definitions of Energy

### Crosscutting Concepts

Patterns
Cause and effect
Scale, proportion, and quantity
Systems and system models
Energy and matter

### Performance Expectations

MS-PS2-2: Plan an investigation to provide evidence that the change in an object’s motion depends on the sum of the forces on the object and the mass of the object
MS-PS2-4: Construct and present arguments using evidence to support the claim that gravitational interactions are attractive and depend on the masses of interacting objects