Question

A system of pulleys is used to raise a load of bricks that weighs 1,700 newtons. The force applied to the pulley is 340 newtons. What’s the mechanical advantage of this machine?

Answer 1

According to the Free Body Diagram of pulley system:

MA = W/T = n.

Here, MA is the mechanical advantage, W is the load, T is the tension, and n is the number of sections of rope supporting the load.

Let's calculate the ratio: 1700/340 = 5

Which means the T = 1/5 W, it can be achieved by compound pulley system with 4 or 5 pulleys.

So MA = 5, this is your answer. 

Answer 2

Answer:   5

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