Question

A body of mass 5 kg has a velocity of 20 metres per second. Its momentum is .

• A. $100{\text{kg m s}}^{-1}$
• B. $25{\text{kg m s}}^{-1}$
• C. $40{\text{kg m s}}^{-1}$
• D. $50{\text{kg m s}}^{-1}$

Answer 1

The correct option is A $100{\text{kg m s}}^{-1}$

Given:
Mass of the ball, $\text{m}=5\text{kg}$
Velocity of the ball, $\text{v}=20{\text{m s}}^{-1}$
The momentum of the ball is given by product of its mass and velocity.
$\text{p = mv}$
$=5\text{kg}\times 20{\text{m s}}^{-1}$
$=100{\text{kg m s}}^{-1}$