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christian's stack
Term | Definition |
---|---|
distance | how far an object move. |
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 an object that is slowing down or speeding up. |
velocity | the speed and direction of a moving object. |
acceleration | rate of change of velocity; can be calculated by dividing the change in the velocity by the time it takes the change to occur. |
force | a push or pull exerted on an object. |
net force | sum of the forces that are acting on an object. |
balanced force | forces on a object that combine to give a zero net force and do not change the motion of the object. |
inertia | resistance of an object to a change its motion. |