Question

3. If a pulley system can lift a 200N load with an effort force of 52 N and has an efficiency of almost 100 percent, how many ropes are supporting theload?

Answer 1

ANSWER:

4

STEP-BY-STEP EXPLANATION:

Given:

Load = 200N

Effort = 52 N

Efficiency = 100%

We have that the mechanical advantage of pulley system represents the number of ropes.

Therefore, we calculate the number of ropes just like this:

$M=\frac{L}{E}$

Where M is the mechanical advantage, L is load and E is effort, therefore, replacing:

$M=\frac{200}{52}=3.8\cong4$

Therefore, a total of 4 ropes are needed