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PS ch2
Vocab
Term | Definition |
---|---|
distance | how far an object moves |
displacement | distance and direction of an object's change in position from the starting point |
speed | distance an object travels per unit of time |
average speed | total distance an object travels divided by the total time it takes to travel that distance |
instantaneous speed | speed of an object at a given point in time; is constant for an object moving with constant speed, and changes with time for any object aht is slowing down or speeding up |
velocity | the speed and direction of a moving object |
acceleration | is the rate of change of velocity |
force | push or pull |
net force | when two or more forces act on an object at the same time, the forces combine to form net force |
balanced force | forces on an object that are equal in size and opposite in direction |
inertia | the tendency of an object to resist any change in its motion |
unbalanced force | forces that cause a change in motion of an object |