A 1300-N crate rests on the floor. Determine the amount of work required in foll

Question

A 1300-N crate rests on the floor. Determine the amount of work required in following two cases. The work required to pull the crate 4.0 m horizontally at a constant speed against a friction force of 230 N. The work required to lift the crate 4.0 m vertically at a constant speed. Determine the work done by the tech crew as they apply a horizontal push to slide a 160-kg prop 10.5 m across the stage floor at a constant speed. The coefficient of kinetic friction is 0.50. Mrs. Laurence has eight books, each of which are 4.3 centimeters thick and have a mass of 1.7 kilograms, lying flat on a table in the library. Determine the amount of work she does on these books to stack them one on top of the other.

Explanation / Answer

Here ,

3) work required to pull the crate = energy lost to frictional force

work required to pull the crate = - (-230 * 4)

work required to pull the crate = 920 J

b) to lift the work required

work required to lift the crate = m * g * h

work required to lift the crate = 1300 * 4

work required to lift the crate = 5200 J

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