Question

force of 20 N accelerates a body from rest to a velocity of 3 m/s in 10 s. The magnitude of change in momentum of the body is one second is

Answer 1

since we know that F = MA

also since v=u+at where u=0 since the body is in rest,

and also give v=3 m/s

so 3=0+a*10

on simplifying we get a=0.3 m/s^2

since F=MA so 20= m*0.3

we get m=200/3

since momentum p=m*v

so P = (200/3) * 3

so the momentum P = 200