A body of mass 20 kg moving with velocity 15 metre per second come to rest due to a tradition force of 50 Newton how much time does it take to come to rest.
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Retardation (a) = F/m
= 50/20
= 2.5 m/s^2
since it is retardation then acceleration become negative.
therefore
a= -2.5 m/s^2.
Now, use v = u + at0
= 15 + (-2.5)TT
= 15/2.5t
= 6 seconds
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