A block and tackle is used to raise a load of 250N through a vertical...
PHYSICS
JAMB 2012
A block and tackle is used to raise a load of 250N through a vertical distance of 30m. What is the efficiency of the system if the work done against friction is 1500J?
- A. 62.5%
- B. 73.3%
- C. 83.3%
- D. 94.3%
Correct Answer: C. 83.3%
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