A mechanic uses a chain and block to lift a 875-kg engine 4.00 m to the top of the garage. The downward force in the chain over the 4.00 m distance is 5.00 x 10^4 N. How much useful work was done? Thannnkkks :)
Hey, I do the same problems over and over. Scroll down.
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To find the amount of useful work done, we need to calculate the work done against gravity in lifting the engine. The work done is given by the formula:
work = force x distance
In this case, the force is the downward force in the chain, which is 5.00 x 10^4 N, and the distance is 4.00 m.
Therefore, the work done against gravity is:
work = (5.00 x 10^4 N) x (4.00 m)
work = 2.00 x 10^5 N·m
So, the useful work done in lifting the engine is 2.00 x 10^5 N·m.