Sports

when we say work is done it means that you put your energy and you finish something.

for example, When you hit a ball with a bat or racquet, work is done in this situation you put your energy to hit a ball also Once that kinetic energy is achieved, work continues to be done just to overcome friction and maintain speed. enargy come from food if you want to play food ball before start you have to eat something because you want to put your energy and you need food.A lot of the energy is used to keep our bodies warm.