The momentum of a moving object depends on its mass and its velocity:
momentum (in kg m/s) = mass (in kg) × velocity (in m/s)
A resultant force acting on any object changes the momentum of that object.
The size of the change in momentum depends on the size of the resultant force and the time for which the force acts:
change of momentum (in kg m/s) = resultant force (in newton, N) × time for which it acts (in s).
To give the same change of momentum, you can have:
- a larger force for a shorter time, or
- a smaller force for a longer time
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