A men weighing 90kg carries a stone of 20 kg to the top of the building 30m high. The work done by hint is (g = 9.8 m/s^2)
A men weighing 90kg carries a stone of 20 kg to the top of the building 30m high. The work done by hint is (g = 9.8 m/s2)
(A) 80 J
(B) 100 J
(C) 980 J
(D) 29,400 J
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Correct option is: (D) 32340 J
m = 90 + 20
m = 110
F = mg
\(F = 110 \times 9.8\)
\(F = 1078 \ N\)
Workdone = F.S
\(1078 \times 30\)
32340 J
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