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physics
Term | Definition |
---|---|
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 motion of the object |
net forces | the sum of all forces acting on an object |
speed | the rate of change of position with respect to time ; units in which speed is measured are expressed as distance per time |
at rest | state of an object that is not in motion |
motion | change in an object’s position with respect to time and in comparison to the position of other objects used as reference points. |
direction | straight path that an object can move along. |
friction | Force that opposes the motion of one surface across another. |
acceleration | rate of change in an objects speed |
frame of reference | system that uses axes or background objects to measure the position or movement of an object. |
velocity | measurement of speed and direction in a n object |