ICSE Class 10 Answered
physics
Asked by pankajkrpal178 | 25 Apr, 2020, 04:34: PM
Expert Answer
m = 2.5 kg, g = 10 m/s2
Force required to pull up the cylindical barrel up the inclined plane, F1 = 40 N
i. Force due to gravity on the body,
F = m × g
F = 2.5 × 10 = 25 N
ii. Work done by the force in pulling the body,
W = F1 × s
W = 40 N × 7.5 m = 300 J
iii. Work done against the force due to gravity,
W = Fs cosΘ
W = 25×7.5× cos 30º
W = 25×7.5× 0.5
W = 93.75 J
Answered by Shiwani Sawant | 25 Apr, 2020, 10:15: PM
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