Systems of Pulleys

SYSTEMS OF PULLEYS
What is Systems of Pulleys? Differentiate first, second and third Systems of Pulleys.

The following three systems of pulleys are commonly used :

1. First system of pulleys.-  For such a system, velocity ratio is:

where
n = Number of pulleys

2. Second system of pulleys. – For this system, velocity ratio:

3. Third system of pulleys.-  For such a system, velocity ratio:

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