Question

(a) Force of gravity acting on the barrel. (Take g — 10ms^-2) 

(b) Work done by the force in pulling body along the inclined plane

(c) Work done against the force of gravity.

Answer 1

(a) Force of gravity F mg 

F = 2.5 x 10 = 25 

(b) Work done in pulling the body along the inclined plane = F x displacement 

= 40x 7.5J 

W = 300J

(c) Work done against force of gravity

Comments

C portion is incomplete

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How did u get m as 2.5