Physics JAMB

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 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 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

Correct Answer:

Option D – 3.6

Explanation

Mechanical Advantage = V.R × Efficiency

= 5 × 0.72

= 3.6

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