Applying the work-energy theorem

Exercise and reference answers

Questions

1. Question

   If net work on a body is positive, its kinetic energy

   Choices

   1. falls
   2. rises
   3. is unchanged

   Correct choice

   rises

2. Question

   If a body's speed is constant, the net work on it is

   Choices

   1. positive
   2. negative
   3. zero

   Correct choice

   zero

3. Question

   Kf minus Ki equals

   Choices

   1. the net work
   2. the force
   3. the displacement

   Correct choice

   the net work

4. Question

   A braking car has net work that is

   Choices

   1. positive
   2. negative
   3. zero

   Correct choice

   negative

Explanation