A block and tackle system has six pulleys. a force of 50N applied to it lifts a load of weight W. If the efficiency of the system is 40%, calculate W.

By: |Published on: May 20|Categories: Physics WAEC| 0 comments

A. 300N
B. 200N
C. 140N
D. 120N

Correct Answer: Option D

D. 120N

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