Which refers to the ratio of output force to input force of a machine?

mechanical advantage

average strength

total power

energy requirement

Answer:mechanical advantage

Mechanical advantage refers to the ratio of output force to input force of a machine.

Explanation:

The formula for mechanical advantage is MA = D/d where D denotes output force and on the other hand, d denotes input force. Mechanical advantage can be increased when the fulcrum moves very close towards the load and another way of increasing mechanical advantage is that when the effort moves away from the fulcrum. Through mechanical advantage we come to know how much force is exerted by a machine when force is applied on the machine.