Question

If you apply a force of 50 N, a pulley system can lift a box with a mass of 20 kg. What is the mechanical advantage of the pulley system?

Answer 1

Answer:

So an MA of 1 then 2 newtons would be required to lift 20 KG

F = Mass Acceleration  = 20 x 10  = 200 Newtons so to lift the same mass with 50 newtons then the mechanical advantage hast to be 200 divided by 50 = 4

Answer 2

The mechanical advantage of the given pulley system is 3.92.

Explanation:

Mechanical advantage is also known as ratio of output force to input force

Given that Input force = 50N and mass of the box = 20kg  

Acceleration due to gravity = $9.8 \mathrm{m} / \mathrm{s}^{2}$ Mass of box =20 kg output Force= 20 × 9.8 = 196N

Mechanical Advantage = $\frac{\text { out put force }}{\text { in put force }}$ = $\frac{196}{50}$ = 3.92. Thus the mechanical advantage of the pulley system is 3.92.