Question

A force multiplier is a machine in which ______.

• A. the effort needed is less than the load
• B. the effort needed is equal to the load
• C. the effort needed is more than the load
• D. there is no effort needed to lift the load

Answer 1

The correct option is A the effort needed is less than the load

A force multiplier is a machine whose mechanical advantage ($\text{M.A}$) is always greater than $1$, in the sense it simply multiplies the applied force or effort by itself. This makes for heavy loads to be lifted with ease.
Now, $\text{M.A.}=\frac{\text{Load(L)}}{\text{Effort(E)}}$
So, for $\text{M.A.}>1$, $\text{Load}>\text{Effort}$
or in other words, the effort needed is less than the load.