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PHYSICS

JAMB 2010 - Question 10

Physics 2010 JAMB Past Questions - Question 10: A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through 1 m. Find the efficiency of the machine.

Choose the correct answers from the options given.

A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through 1 m. Find the efficiency of the machine.

A: 50.0%.

B: 22.2%.

C: 33.3%.

D: 55.6%.

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Correct Answer

Explanation

Efficiency = (MA)/V.R x 100% = (load)/Effort x (1)/V.R
= (800)/400 x (1)/6 x 100% = 33.3%