Why do you need momentum?

Answer 1

Momentum is defined as the "Mass in Motion". It is a Vector quantity. It depends on two variables (Object Mass and Velocity) . Its direction is same as objects velocity direction.

In physics momentum is required to specify the motion of the object . If two bodies of same masses having different velocities have different momentum , in a similar way bodies of different masses having same velocity have different momentum.

So , in order to describe the motion of object clearly one of the tool in classical mechanics is momentum

Answer 2

Momentum is important in physics because it describes the quantity of motion an object has. It is a property that helps us understand how objects behave in collisions and interactions with forces. Momentum is useful for predicting the outcome of these interactions and calculating things like the speed and direction of objects after a collision.