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AP Physics 1

Vocabulary Chapter 7

TermDefinition
Conservation of Momentum When no net external forces acts on a system, the total momentum of the system remain unchanged. When two internal bodies interact and no external forces are acting on the objects, their total momentum remains unchanged.
Elastic Collisions Very brief actions of two or more particles where they come in close position with one another, resulting in a change in momentum or exchange of energy. These "collisions" obey the law of conservation.
Impulse The change in the momentum of an object that occurs when an unbalanced force acts upon the object for a period of time. >N*s is the SI unit of impulse
Inelastic Collision The usual case for collisions, in which kinetic energy is not conserved, but momentum is conserved.
Momentum A vector quantity that has the same direction as an objects velocity, its magnitude is equal to the product of the objects mass and speed; p=mv.
Created by: BMcCormack