Question

Explain Momentum and its associated principles.

Answer 1

The momentum of mechanical body is a product of its velocity and mass.

$p=mv$

The unit of momentum in SI is $kg \cdot m/s^2$ .

If there are no external forces acting on the system of bodies, then the total momentum is conserved

$p_1 +p_2 + ...+p_N = const$

The second Netwon's law can be written in terms of momentum:

$\displaystyle \frac{dp}{dt} = F$