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 maximum load lifted by the system is:

Options

• 350 kgf

• 360 kgf

• 370 kgf

• 355 kgf

Answer 1

360 kgf

Explanation:

Mechanical advantage (MA) = 0.90 × 4 = 3.6

L = MA × E

= 3.6 × 100 kgf

= 360 kgf