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# Momentum

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### Momentum

1. 1. By iTutor.com T- 1-855-694-8886Email- info@iTutor.com
2. 2. Momentum A quantity expressing the motion of a body or system, equal to the product of the mass of a body and its velocity, and for a system equal to the vector sum of the products of mass and velocity of each particle in the system. Momentum = mass • velocity
3. 3. Momentum The momentum of a ball depends on its mass and velocity. Ball B has more momentum than ball A.
4. 4. Momentum and collisionsMomentum p=mv(kg m/sec) Velocity (m/sec) Mass (kg) Momentum is a vector; its direction is the same as the direction of the velocity.
5. 5. Conservation of Momentum The law of conservation of momentum states when a system of interacting objects is not influenced by outside forces (like friction), the total momentum of the system cannot change.If you throw a rock forward from askateboard, you will move backward inresponse.
6. 6. Example of conservation of momentum SHOOTING A GUN AND RECOIL
7. 7. Law of Conservation Of Momentum Total momentum of an isolated system before collision is always equal to total momentum after collision.MATHEMATICAL REPRESENTATION Consider an Two bodies A and B and mass m1 and m2 moving initially with velocities u1 and u2 Total momentum before collision = m1u1 + m2u2 Let after collision their velocities become v1 and v2. Total momentum after collision = m1v1 + m2v2
8. 8. Law of Conservation Of MomentumAccording to the law of conservation of momentum m1u1 + m2u2 = m1v1 + m2v2
9. 9. www.itutor.comThe End