Question

a body at rest has a mass of 3 kg .A force 12N acts on it for 4 sec . calculate the velocity or change in momentum​

Answer 1

Explanation:

u = 0m/s

m = 3 kg

F = 12 N

t = 4 secs

F = m*a

F = m*(v-u/t)

12 = 3 * ( v-0/4)

12*4 = 3v

48/3= v

v = 16m/s

Hope it helps you❤