Impact means forceful coming together of two things. Impact refers to power to bring about results on others. Impact describes quality of utterance producing effect
Total momentum of a system remains constant during collisions. Forces between objects are equal in magnitude and opposite in direction. Impulses experienced by objects are equal in magnitude and opposite in direction
Momentum is the product of mass and velocity, denoted as p = mv. It is a vector quantity with magnitude and direction. SI unit is kg·m/s, cgs unit is g·cm/s. Objects with greater mass naturally have higher momentum