Judge these energy claims

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   A kilowatt hour measures energy, not power.

2. Statement is true

   No

   Statement

   Kinetic energy comes out negative when a body slows down.

3. Statement is true

   Yes

   Statement

   The work-energy theorem holds in every inertial frame.

4. Statement is true

   No

   Statement

   Friction carries a potential energy function of its own.

5. Statement is true

   Yes

   Statement

   Total linear momentum is conserved at every instant of a collision.

6. Statement is true

   No

   Statement

   Where potential energy counts as zero is fixed by nature, not by choice.

Instructions

Tap true or false for each claim as it comes up.

Explanation