The velocity ratio of a machine is 5 and its efficiency is 75%. What effort
PHYSICS
JAMB 2000
The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?
- A. 20N
- B. 30N
- C. 40N
- D. 50N
Correct Answer: C. 40N
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