A pulley system with a velocity ratio of 4 is used to lift a load of 100kgf through a vertical height is 15m. The effort required to do so is 40kgf which is applied in the downward direction. calculate the number of pulleys in the upper and lower block.(g=10 N kg^-1).

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Solution

Given
Velocity ratio = 4
Explanation
Here pulley system is perfectly efficient the velocity ratio is equal to the number of pulleys.
$∴$ Number of pulleys = V.R = 4 (even)
$∴$ 2 pulleys in the fixed block and 2 pulleys in the movable block.

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A pulley system with a velocity ratio of 4 is used to lift a load of 100kgf through a vertical height is 15m. The effort required to do so is 40kgf which is applied in the downward direction. calculate the number of pulleys in the upper and lower block.(g=10 N kg-1).

Given Velocity ratio = 4ExplanationHere pulley system is perfectly efficient the velocity ratio is equal to the number of pulleys.∴Number of pulleys = V.R = 4 (even)∴2 pulleys in the fixed block and 2 pulleys in the movable block.

A pulley system with a velocity ratio of 4 is used to lift a load of 100kgf through a vertical height is 15m. The effort required to do so is 40kgf which is applied in the downward direction. calculate the number of pulleys in the upper and lower block.(g=10 N kg^-1).

Given
Velocity ratio = 4
Explanation
Here pulley system is perfectly efficient the velocity ratio is equal to the number of pulleys.
$∴$ Number of pulleys = V.R = 4 (even)
$∴$ 2 pulleys in the fixed block and 2 pulleys in the movable block.