it begins when the striker's mallet contacts the ball and ends when all balls set in motion by the striker have stopped rolling or have crossed a boundary.

The arm and hand motion during the delivery over the foul line.

The linear movement of a valve spool or cylinder rod that establishes the limits of motion.

The movement of an element of a valve spool, cylinder rod or pump or motor displacement in a straight line that sets the limits of motion.

The reciprocating motion of a press slide, usually specified as the number of inches between the terminal points of the motion.