A pulley system has three pulleys in the fixed block and two in the movable...

JAMB 2018

A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?

A. 36.0
B. 7.2
C. 5.0
D. 3.6

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Correct Answer: Option D

Explanation

Mechanical Advantage = V.R × Efficiency

= 5 × 0.72

= 3.6

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A pulley system has three pulleys in the fixed block and two in the movable...

Correct Answer: Option D

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