Mechanical advantage: It is ratio of output force and input force.
Efficiency: It is ratio of output work and input work expressed as a percentage.
Answer: Option A and D
Explanation:
A mechanical advantage is defined as the ratio of output force to the input force. No units are there for the mechanical advantage. Based on the Law of conversation of energy, the energy cannot be multiplied. Efficiency is being defined as the effect of the device on the output work. It is represented as a percent.
