# What is momentum?

Momentum is the product of mass and velocity of an object. It is a vector quantity.

The SI unit of momentum is kg m/s.

The force acting on an object equals the rate of change of momentum of the object.

Force = rate of change in momentum

mv = constant

The change in momentum formula is given as:

p = mv

Therefore, when mass m is fixed, p is proportional to v.

Similarly, when v is constant, p is proportional to m.

Therefore, and graph are both straight lines.

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