True or false: energy bookkeeping

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Positive net work speeds a body up.

2. Statement is true

   Yes

   Statement

   Negative net work slows a body down.

3. Statement is true

   Yes

   Statement

   Zero net work leaves the speed unchanged.

4. Statement is true

   No

   Statement

   The theorem needs the force to be conservative.

5. Statement is true

   Yes

   Statement

   The theorem applies to the NET force, not one force alone.

Explanation