1Contact forces
Contact forces arise from the physical contact between two objects
2Non contact forces
Non contact forces arise even if two objects do not touch each other
3Momentum
Liner momentum is the product of an object's mass and its velocity
4Newtons second law of motion in terms of momentum
The net force acting on an object is equal to the rate of change of momentum of the object in the direction of the net force
5Principle of conservation of linear momentum
The total linear momentum in an isolated system remains constant
6Closed System
A system in which the net external force acting on the system is zero
7Impulse
The product of the resultant/net force acting on an object and the time the resultant/net force acts on the object
8Elastic Collision
A collision in which both total momentum and total kinetic energy are conserved
9Inelastic Collision
A collision during which kinetic energy is not conserved