Question

A body of mass 5 kg is moving with uniform velocity 2 m/sec, find its (a)momentum and (b) force

acting on it​

Answer 1

Given:

Mass of body $=5kg$

Velocity of body $=2m/sec$

To Find:

(a) momentum

(b) force

Solution:

(a) The momentum of a body can be given as:

$\[p = mass \times velocity\]$

$\[p = 5kg \times 2m/s\]$

$\[p = 10\,kgm/s\]$

Hence, the momentum of the body is $\[10\,kgm/s\]$.

(b) Force can be given as:

$\[F = \frac{{Change\,in\,momentum}}{t}\]$

Since the body is moving with uniform velocity, there will be no change in momentum.

Therefore,

$\[F = \frac{0}{t}\]$

$\[F = 0\]$

Hence, the force acting on the body is zero.