by appling a
force. The trolley comes to rest after traversing a distance of 16 m. (a) How
much work is done on the trolley? (b) How much work is done by the girl?
Answer:
Given, 
and
From the third equation of motion
[
for
retardation, the acceleration is negative i.e., 
] 
u = inital velocity, v = final velocity, a = acceleration
and s == displacement
(a) Total mass = 35 + 5 = 40 kg
Work is done on the trolley
(b) Mass of girl m= 35 kg
Work done by the girl
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