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ICSE Class 10 Answered

physics
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Asked by pankajkrpal178 | 25 Apr, 2020, 04:34: PM
answered-by-expert 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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