Work power and chemical advantage

Work is known as the transfer of energy to a body by the application of a force that causes the body to move in the direction of the force. For example, as a father playing with his daughter by lifting her repeatedly in the air. The father is doing work by exerting a force on the girl. On the other hand power is a quantity that measures the rate at which work is done and energy is transformed. An example of power would be work divided by time, if you ran to your destination, it would take less time than walking does. Time and work influence power. Mechanical advantage is a quantity that measures how much a machine multiplies force or distance. Output force divided by input force influences mechanical advantage. So far I have no questions about the chapters curriculum.