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### 14 Cards in this Set

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 What is the differance between mass and weight? mass is the gravity of matter in a body, it does not change with the location. weight is the force on the mass by the earthor any other planet, changes with the location. what is friction? friction is a force always opposite to the direction of motion. it is a self adjusting force, it varies from 0 to a maximum value called limiting friction. limiting friction to move a body from rest you must apply a force slightly more than the limiting force, once the body starts moving friction reduces itself What is the differance between mass and weight? mass is the gravity of matter in a body, it does not change with the location. weight is the force on the mass by the earthor any other planet, changes with the location. momentum mass x velocity P=MxV what is friction? friction is a force always opposite to the direction of motion. it is a self adjusting force, it varies from 0 to a maximum value called limiting friction. Conservation of Linear momentum Initial momentum = Final momentum limiting friction to move a body from rest you must apply a force slightly more than the limiting force, once the body starts moving friction reduces itself momentum mass x velocity P=MxV Conservation of Linear momentum Initial momentum = Final momentum Perfectly elastic the bodies are rigid. they do not deform. therfore 1. no loss of kinetic energy 2. velocity on approach = velocity of separation inelastic loss of kinetic energy b/c the bodies deform Perfectly inelastic loss of kinetic energy b/c the bodies deform BUT after collision the bodies stick together newton's second law F=m x a