Question

An object of mass 10kg changes its velocity from 5m/s to 10m/s by the application of a force of 20N. Find the time for which the force is applied

Answer 1

Explanation:

Force is equal to the rate change of momentum. i.e

F

=m

dt

d

v

So, F=10×

4

(−2)−10

N=−30N