What is the mechanical advantage of a machine that lifts a load of 75 N with an effort of 15 N?

Given,

• Load = 75 N
• Effort = 15 N

As,

$\text {Mechanical Advantage (M.A.)} = \dfrac{\text {Load}}{\text {Effort}}\\[1em] \Rightarrow \text {M.A.} = \dfrac {75}{15}\\[1em] \Rightarrow \text {M.A.} = 5$

So, mechanical advantage of the machine is 5.