Question

A force of 100N acts on a body for 5s and produces a velocity of 50ms-¹.Find the mass of the body

Answer 1

i think
f=100N
t=5s
v=50m/s
u=0m/s
ta=v-u
5a=50
a=10m/s^2
f=ma
100=m×10
m=10kg

Answer 2

If initial velocity is zero then you may solve like this.