Question

A crane pulls up a car of mass 500 kg to a vertical height of 4m. Calculate the work done by the crane.​

Answer 1

Explanation:

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Answer 2

✠ In order to raise the car, the crane has to do work against the force of gravity.

Therefore,

• The Force required to lift the car F = mg.

➣ 500 ༝ 9.8

➣ 4900 N

Now,

★ Displacement S = Vertical height moved = 4m.

We Know,

• W = FS

➣ 4900 ༝ 4

➣ 19600 J.

Therefore,

• Hence, the work done by the crane is 19600 J.

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⚘ Know More :

• f is force, m is mass , g is gravity, s is displacement, w is work done.

• Gravity is always 9.8m/s² and 10m/s².

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