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?

Answer 1

hi friends 

your question is - 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. 

ans: The athlete isn’t doing any work because he doesn’t move the weight.
thankyou

Answer 2

You didn't mention statements .
But according to question , I think question is related to work .

as you know,
work done = Force × displacement along direction of Force .

but here athletic holds 50 Kg above his head for 10 sec .here Force acting downward direction e.g F = 50 × 10 = 500N , but , displacement = 0 along force or if he moves forward then, displacement is perpendicular upon force . So, in both cases WORK = 0 .

hence, athletic isn't doing work .