Question

Four persons jointly lift a 250 kg box to a height of 1 m and hold it. calculate the work done by the persons in lifting the box

Answer 1

Hey!

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Mass of the box = 250 kg
Height to which it's carried= 1m
Work done =?

Work done = Force×Distance
Work done = mg×s

Force= 250×10=2500 N
Work done= 2500×1
Work done = 2500 J

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Hope it helps...!!!

Answer 2

Work done = Force×Displacement of the object in the direction of force applied

Force = mass × gravity
Force = 250×10
Force = 2500 N

[ Force may vary if g= 9.8 m/s^2]

Now,

W.D = 2500×1
W.D= 2500 J