The rate of change of
momentum of a body is equal to the net , unbalanced or resultant external force acting on the body. OR, equivalently, the force acting on a body is equal to the product of its mass
Momentum : it is the product of mass and
velocity of the body. It gives the total amount of velocity in the total body.
It gives the total impact the body will have if it collides with another
object. It is also related to the amount of force required to stop the body. If
one with higher momentum collides with another, one is hurt more.
Force is a vector.
Momentum is also a vector quantity.
Force is the external influence that causes change of state of inertia
(of direction or state or rest or uniform motion) of a body.