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14 Cards in this Set
- Front
- Back
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What is the differance between mass and weight?
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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.
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what is friction?
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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.
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limiting friction
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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
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What is the differance between mass and weight?
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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.
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momentum
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mass x velocity
P=MxV |
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what is friction?
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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.
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Conservation of Linear momentum
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Initial momentum = Final momentum
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limiting friction
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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
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momentum
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mass x velocity
P=MxV |
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Conservation of Linear momentum
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Initial momentum = Final momentum
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Perfectly elastic
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the bodies are rigid. they do not deform. therfore
1. no loss of kinetic energy 2. velocity on approach = velocity of separation |
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inelastic
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loss of kinetic energy b/c the bodies deform
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Perfectly inelastic
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loss of kinetic energy b/c the bodies deform BUT after collision the bodies stick together
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newton's second law
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F=m x a
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