Question

A force acts on a particle of mass 200 g. The velocity of the particle charges from 15 m/s to 25 m/s in 2.5 s. Find its magnitude.​

Answer 1

Final Answer : 1N

Steps and Understanding :

1) By Newtons Second Law of Motion,

Force is rate of change of Momentum,

Here, assuming Force is constant.

Mass of particle, m = 200g = 0.2Kg

Final Velocity, v = 25m/s

Initial Velocity, u = 15m/s

Time taken, t = 2s

Then,

F = m(v-u) /t

= 0.2 (25-15)/2.5

=1N

Magnitude of Force is 1N .