Question

A 75.0kg man pushes on a 5.0 x 105 tonne wall for 250s but it does not move. How much work does he do on the wall?

(2000 lb = 1 ton; 0.454 kg = 1 lb)

Answer 1

No work is done by the man on the wall as it does not move, so the answer is zero joules of work.

Step-by-step explanation:

The student asked how much work a 75.0kg man does on a wall if he pushes it for 250 seconds but the wall does not move. In physics, work is defined as the product of the force applied to an object and the distance that object moves in the direction of the force (Work = Force x Distance). Since the wall does not move, the distance is zero. Consequently, no work is done on the wall regardless of how long or how hard the man pushes. The equation simplifies to Work = 0 because the distance (displacement) is 0 meters.