Question

Define force and mention its unit.

Answer 1

1. The push or pull of an object is considered a force. Push and pull come from the objects interacting with one another.
2. When a body is acted upon by a force, the time rate of change of its momentum equals the force.
   $$\begin{gathered} F=\frac{dP}{dt} \\ WhereFisforcePismomentum \\ P=mVmismass,Visvelocity \end{gathered}$$
3. The quantity of force is expressed as the product of mass (m) and acceleration (a).

$F=ma$
Where, m = mass, a = acceleration

3. As mass is measured in $kg$ and acceleration in $m/s^2$, therefore SI unit of force is

$kg\times m/s^2=newton$

Thus the SI unit of force is the Newton (N).