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A machine has a velocity ratio of 4. if it requires 800 N to overcome...

Physics
JAMB 2007
A machine has a velocity ratio of 4. if it requires 800 N to overcome a load of 1600 N,what is the efficiency of the machine?
  • A. 60%
  • B. 50%
  • C. 40%
  • D. 2%
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Correct Answer: Option B
Explanation
Efficiency = (M.A)/V.R X (100)/1
But M.A = (Load)/Effort = (1600)/800 = 2
Efficiency = (2)/4 x (100)/1 = 50%

There is an explanation video available below.

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Explanation Video

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