A unidirectional force F varying with time t as shown in the fig. acts on a body initially at rest for a short duration 2T. Then the velocity acquired by the body is
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a
πF0T4m
b
πF0T2m
c
F0T4m
d
zero
answer is D.
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Detailed Solution
Area under the graph is zero Hence change in momentum = 0m (v – u) = 0 ⇒ m (v – 0) = 0 Since m is not zero , ⇒ V = 0