A crane lifts a 545 kg piano up into a high-rise apartment 75.0 meters above the ground. In order to do so, 5350 Newtons were applied to the piano. How much work is done on the cart?

Work done to pull the piano upwards is 401250 J

Explanation:

Work is done against the gravity to pull the piano upwards

So here we can say that work done is

here we know that

also we know that

H = 75 m

now we have

trig 15.3 cos

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