Question

An athlete is working out in the weight room. He steadily holds 50 kilograms above his head for 10 seconds. Which statement is true about this situation?

a) The athlete isn’t doing any work because he doesn’t move the weight.
b)The athlete isn’t doing any work because he doesn’t hold the weight long enough.
c) The athlete is doing work because he prevents the weight from falling downward.

d)The athlete is doing work because 50 kilograms is a significant load to lift.

Answer 1

Well the athlete it's definitely doing work, so it has to be either c or d. I would go with c, because he is holding up for 10 seconds

Answer 2

The answer would be A, the athlete isn't doing any work because he doesn't move the weight.
Explanation: Work in physics mean force X distance, if there is no distance involved he isn't doing any work.