Answer :

purnima1
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same momentum
kvnmurty
u1 = 0        u2 =  0    initial speeds
let  m1  >=  m2

F = m1  a1  = m2 a2
The force acts on the two bodies for the same time duration Δt

Hence,  F * Δt = change in momentum
                     = final momentum,   as initial momentum = 0.

So the final momentum is same for both.  The body with higher mass will have less speed.

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