Question

A body of mass 20kg moves with an acceleration of 2m/s^2. What is the rate of change of momentum in S.I. unit ?

Answer 1

Given,
Mass = 20 kg
Acceleration = 2 m/s^2


We know,
Force = mass × acceleration
Force = 20 x 2
= 40 newton

Hence, the rate of change of momentum is 40 newton.

Answer 2

Given :

Mass (m) = 20 Kg

Acceleration (a) = 2 m/sec²

To Find :

The rate of change of momentum in S.I. unit

Solution :

According to Newton's Second law of motion, the change in momentum of any object is equal to the product of mass and acceleration.

We know, Force =  mass (m) × acceleration (a)

Therefore, Force = Rate of change of momentum

Rate of change of momentum =  mass (m) × acceleration (a)

                                                 =  20 × 2

                                                 =  40 N

∴ The rate of change of momentum i.e., force is 40 N.