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15 terms

Motion and Momentum (Ch.1)

Study for Vocab. test on Monday (Nov.8)
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speed
the distance traveled divided by the time
(s=d/t)
average speed
the total distance traveled divided by the total time taken
instantaneous speed
the speed of an object at one moment in time
acceleration
change in velocity divided by time taken for the change to take place
positive acceleration
speed up
negative acceleration
slow down
velocity
speed and direction of a moving object
inertia
tendency of an object to resist a change in it's motion
momentum
a measure of how hard it is to stop a moving object; dependent on it's mass and velocity
law of conservation of momentum
the total momentum of objects that collide with each other is the same before and after the collision
collision
when two or more objects hit each other
motion
a change in position
relative motion
a change in position of one object compared to the position of another
distance
how far an object moves
displacement
the distance and direction an object moves relative to it's starting point