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physics vocab
Term | Definition |
---|---|
motion | the change in an objects position with respect to time and in comparison to the position of other objects used as reference points |
speed | the rate of change of position (or distance traveled) with respect to time; units in which speed is measured are expressed as distance per time (example; meters per second) |
velocity | measurement of speed and direction of an object |
acceleration | the rate in an object's speed |
force | a push or pull that can change the motion of an object |
balanced forces | separate forces on an object that combined do not change the movement of the object |
unbalanced forces | forces on an object that cause change in the motion of the object |
net force | the sum of all the forces acting on an object |
at rest | the state of an object when it is not in motion |
direction | a straight path that an object can move along |
friction | force that opposes the motion of one surface across another |
frame of reference | A system that uses axes or background objects to measure the position or movement of an object. |