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
From O to T, area is (+)ve and from T to 2T,, area is (-)ve , net area is zero, hence, no change in momentum.
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