Question

Choose the correct statements regarding momentum.
Statement 1: Momentum has both direction and magnitude.
Statement 2: SI unit of momentum is ${kgms}^{-1}$.
Statement 3: A balanced force can create a change in velocity.
Statement 4: An unbalanced force can create a change in velocity.
Statement 5: A balanced force can create a change in momentum.
Statement 6: A unbalanced force can create a change in momentum.

• A. All statements, except 5
• B. All statements except 5 and 3
• C. All statements except 2
• D. All statements except 1

Answer 1

The correct option is B All statements except 5 and 3

Momentum is a vector quantity, as it has both magnitude and direction.
Let 'p' be the momentum, 'm' be the mass and 'v' be the velocity.
We know, $momentum,p=m\times v$
The SI unit of momentum is ${kgms}^{-1}$.
Since, an unbalanced force can bring a change in motion i.e., velocity; and momentum depends on velocity. Momentum can be changed by the application of unbalanced force.
A balanced force cannot bring a change in the motion, thus balanced force cannot change momentum.