work done by a man weighing 140 kg and carrying 20 kg low to the top of the lead a 16 metre long making an angle of 30 degree with the horizontal
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The work done is W = 12544 J
Explanation:
The data given is as follow:
Weight of Aman = 140 Kg
Load = 20 Kg
Total weight = 140 + 20 = 160 Kg
H = 16 m
Angle = 30°
Solution:
Work done = Force x displacement
W = F . s = F.d cosθ
W = m.g.s cosθ
W = 160 x 9.8 x 16 cos(30°)
W = 160 x 9.8 x 16 x 1/2
W = 12544 J
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