Answer: A machine is used to multiply force.
Explanation :
A machine makes our work easier. It is used to multiply force. The machines could be of two types i.e. simple machines and compound machines.
The multiplication of the force is called the mechanical advantage of the machine. If the machine is ideal it is called ideal mechanical advantage.
This shows that the small input force can give off a large output force.
Hence, the correct option is (D) " force".
