# Shared Flashcard Set

## Details

Motion and Momentum Vocab
Mrs. Desjardines
10
Physics
03/01/2009

Term
 Speed
Definition
 how fast you change positionm/srequires a relative positionspeed = rate times time
Term
 velocity
Definition
 total distance (m)/ total time = m/s + directiondifferent from speed due to directionnorth, south, east, westm/s
Term
 average speed
Definition
 total distance (m) / total time (s) = m/sthe average rate at which an object covers a distancemost objects don't move in a constant speed.m/s
Term
 acceleration
Definition
 velocity (m/s + direction)/ total time + m/s(squared) =meters per second/per secondchange in velocity over timenegative = decreasepositive = increase
Term
 negative acceleration
Definition
 when you slow down5 m/s/sspeedhelped by friction
Term
 mass
Definition
 amount of matter in an objectkgnever changesconfused with weight
Term
 inertia
Definition
 a measure of how much an object resists a change in its motionNewton's Third Lawchange in velocityobjects at rest will stay in rest unless acted on by another force
Term
 momentum
Definition
 mass x velocitykgm/svelocitychange
Term
 displacement
Definition
 how far and in what direction an object an object has moved from its starting pointspeedaccelerationchange
Term
 law of conservation of momentum
Definition
 when two objects collide, the total momentum before the collision is the same as the total momentum after the collison is the smae as the total momentum after the collision.transfernothing losttotal amount
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