Question

A movable pulley system has velocity ratio 4 and efficiency 90%. If an effort of 100 kgf acts at its free end, answer the following question.

The mechanical advantage of the pulley system is:

Options

• 3.4

• 3.8

• 3.6

• 3.9

Answer 1

3.6

Explanation:

Use $$\eta = \frac{\mathrm{MA}}{\mathrm{VR}}$$

Therefore, $$\mathrm{MA} = 0.90 \times 4 = 3.6$$