We have that from the Question, it can be said that
- does no work because the force he applies does not cause the barbell to move.
Option A
From the Question we are told
If a weight lifter holds a 200 kg barbell in place over his head, he _______
A:does no work because the force he applies does not cause the barbell to move.
B: does work because the barbell is heavy to hold.
Generally the equation for work is mathematically given as
w=f*d
Therefore
For an instance where distance traveled is zero and force exerted is a 1000N the work done will still be zero because
1000*0 =0
Therefore
does no work because the force he applies does not cause the barbell to move.
Option A
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