Question

A block and tackle system with convenient direction has four pulleys in movable block. The velocity ratio of the system is:

Options

• either 8 or 9

• 8

• 9

• 7

Answer 1

Either 8 or 9

Explanation:

In a block and tackle, the velocity ratio equals the number of rope segments supporting the movable block. Depending on the arrangement, four pulleys in the movable block can give a velocity ratio of 8 or 9.