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=Physics is my Business= media type="youtube" key="VKCdq6X08Sw" height="344" width="425" "The video doesn't really start until the 27second mark" =7.1= =Momentum=

Definition- Momentum is a vector quantity and is the product of the mass and velocity of an object The equation to find momentum is P=MV P= Momentum M= Mass V= Velocity Momentum is a conserved quantity, meaning that the total momentum of any closed system cannot change. It is the Inertia of motion. Momentum is a conserved quantity, meaning that the total momentum of any closed system cannot change. It is the Inertia of motion.

=7.2= =Impulse Changes Momentum= Definition- Product of force and time interval during which the force acts. Impulse equals momentum change.

Impulse = Ft F= Force t= time Impulse is measured in Newtons-Seconds A force of one Newton applied over one second will change the momentum, a force of two Newton's applied over half of a second will have a similar effect. = =

=7.3= =Bouncing= Bouncing simply increases impulse.

=7.4= =Conservation of Momentum= Definition- the momentum of a system is constant if there are no external forces acting on the system. Newtons first law fits in here. =7.5= =Collisions= Definition- When objects collide without being permanently deformed and without generating heat. No loss of Kinetic energy The sum of the momentum vectors are the same before and after each collision.  **net momentum before collision = net momentum after collision **
 * =Elastic Collisions=



Definition- When objects collide and DOT NOT return to their original shaped. Change of Kinetic Energy Collisions usually involve external forces which has little impact on the net momentum so it doesn't effect it. [|Click here for a demonstration of Elastic and Inelastic Collisions]
 * =Inelastic Collisions=

=7.6= =Momentum Vectors= Momentum is a vector quantity. Momentum is conserved even when the object is NOT moving in a straight line.

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