Question

Momentum is a measure of:
$\left( A \right)$ Weight
$\left( B \right)$ Mass
$\left( C \right)$ Quantity of motion
$\left( D \right)$ Velocity

Answer 1

- Hint: In this question use the concept that Momentum is a physics term; it refers to the quantity of motion that an object, it is also the product of mass of the object and the velocity of the object by which the object is moving so use these concepts to reach the solution of the question.

Complete step-by-step answer:
As we know that the momentum of any body is the product of mass of the body and the velocity of the body by which the body is moving.
$\Rightarrow p = mv$, where p = momentum, m = mass of the body and v = velocity of the body by which it is moving.
So the momentum refers to the quantity of motion that an object has.
It is a vector quantity i.e. it has magnitude as well as direction.
As we all know that mass is a scalar quantity and velocity is a vector quantity so momentum is also a vector quantity.
So momentum is a measure of quantity of motion.
The unit of momentum is kg-m/s.
So this is the required answer.
Hence option (C) is the correct answer.

Note: Always remember that momentum is a conserved quantity in any inertial frame and it always retains its properties in case of electrodynamics, special relativity etc. as velocity is dependent on direction so momentum is also dependent on direction and also remember that according to Newton’s second law of motion the net force working on the body is equal to the rate of change in the momentum of the body.