Question

A body moving at a constant speed is made of to stop in 0.25 sec by applying a force of 200N calculate the initial momentum of the body

Answer 1

v= 0 t =0.25s

F = ∆p/t

∆p = 200×0.25

∆p = 50 kg.m/s


mv - mu = 50

v=0

-mu = 50
mu = 50