Coupon Accepted Successfully!


Linear Momentum

Momentum is a physical quantity which is useful in understanding Newton’s second law. It is a measure of the inertia of motion. It is also the ability of a body to impart motion to another body or the quantity of motion contained in a body. Momentum depends on two factors, namely
  1. mass of the body and
  2. velocity of the body.
The linear momentum of a body is defined as the product of its mass and velocity.

If m is the mass of the body and v is its velocity, the momentum p of the body is given by
p = mv
It is a vector in the direction of velocity.
The SI unit of momentum is kg m s−1.
Newton’s second law of motion can also be stated as ‘the rate of change of momentum of a body is proportional to the applied force and takes place in the direction of the force’.
Therefore, Newton’s second law can be written in terms of momentum as follows:
F = ma
Description: 50664.png   Description: 54480.png
Description: 50674.png
Thus, the resultant force on a body is equal to change in linear momentum per unit time.

Test Your Skills Now!
Take a Quiz now
Reviewer Name