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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