Question

a young man exerted a force of 9,000 newtons on a stalled car but was unable to move it. how much work was done?

Answer 1

Work = Force*distance
Although there was a force, there was no distance.

Work = Force*0 = 0 Joules, or no work

Answer 2

The work done by a young man that was unable to move a car when exerted a force of 9000 N is zero.

According to definition of work, we have:

$W = F*d*cos(\theta)$

Where:

F: is the force acting on the object

d: is the displacement

θ: is the angle between the force and displacement

The young man exerted a force of 9000 N, but since he was unable to move it, the displacement is zero, so the work done is:

$W = F*d*cos(\theta) = 9000 N*0*cos(\theta) = 0$

Therefore, the work done is zero.

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I hope it helps you!