Work Work is the transfer of energy by force acting through a distance. The SI unit of work is joules. The formula for finding Work is by multiplying force times displacement. (W=F*d). Energy placed into an object, is work done on that object. When a tennis player hits the tennis ball, he or she is doing work on the racket, and so, energy from the player transfers into the racket. In turn, work or energy from the racket transfers in to the tennis ball, when the tennis racket comes in contact with the tennis ball. (As shown in Figure 4) Thus when an object is still or at rest, you have to put energy or work in to that object to get it moving. In order to start the game of tennis, a player has to serve the ball to the opponent, and this takes work or energy to do so. When energy from a player is transferred to the racket, this can cause a vibration of the racket. Energy is also being transferred when the two players return a volley, groundstroke, or on a return. These are several ways the Physics concept Work, applies to Tennis. |
 Figure 4 |
