study of motion, forces, and energy.
a point against which a position's movement is measured.
how quickly a motion occurs; a scalar quantity; distance traveled / time traveled = ________
speed and direction; a vector quantity
a physical measurement that contains directional information
a physical meausrement that does not contain directional information
Objects traveling in the same direction
relative speed is the diference between their individual speeds
Objects traveling in the opposite direction
relative speed is the sum of their individual speeds
the time rate of change of an object's velocity
(final velocity - initial velocity) / time = ______________.
the motion of an object when it is falling solely under the influence of gravity.
9.8 meters/second squared
Metric rate of acceleration due to gravity
32 feet/second squared
English rate of acceleration due to gravity
___________ = 1/2 x (acceleration)(time) squared
An object's resistance to change
A force that opposes motion, resulting from the contact of two surfaces
Friction that opposes motion once the motion has already started.
Friction that opposes the initiation of motion
Newton's First Law
An object in motion (or at rest) will tend to stay in motion (or at rest) until it is acted upon by an outside force.
Newton's Second Law
When an object is acted on by one or more outside forces, the total force is equal to the mass of the object times the resulting acceleration.
Newton's Third Law
For every action, there is an equal and opposite reaction