A students caries a bag weighing 5 kg from the ground floor to his class on the first floor that is 2 m high. The work done by the boy is
(a) 1 J (b) 10 J (c) 100 J (d) 1000 J
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Answer:
force = mass × acceleration
F=5kg× gravitational acceleration ( 10) =50
work = force × displacement (F ×d ) =50× 2 = 100
so answer is 100 J
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Your answer is in the above pic
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