Momentum of a system remains conserved. Therefore, o
Greater force is required to set heavier bodies in motion o
Greater force is required to stop bodies moving with higher velocities
Conclusion: Greater the change in momentum in a given time, greater is the force that needs to be applied. In other words, greater the change in momentum vector, greater is the force applied.
Newton’ s Second Law o
o
The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in which the force acts.
Alternatively, the relationship between an object ' s mass m, its acceleration a, and the applied force F is F = ma; the direction of the force vector is the same as the direction of acceleration vector.