Question

mechanical advantage is an advantage you get by using a machine and the number of times a machine multiples the effort.
input force, also known as effort force, is the force put into a machine.
is the force the machine exerts on an object.
resistance force is the force opposing the effort.
machines make work easier but they do not change the amount of work being done.
what is the force put into the machine?
output force
resistance force
input force

Explanation:

The question asks for the force put into a machine. As per the given definitions, "Input force, also known as effort force, is the force put INTO a machine."

Answer:

C. Input force