The efficiency of a machine is 80%. If it lifts a load of 500 N through 2 m, effort applied through 10 m. Effort is MCQ with Answer and Explanation

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The efficiency of a machine is 80%. If it lifts a load of 500 N through 2 m, effort applied through 10 m. Effort is

A. 200 N

B. 125 N

C. 80 N

D. 100 N

Answer: Option B

Solution (By JKSSB Mock Tests)

Work output = 500×2=1000 J. Work input = output/eff = 1000/0.8=1250 J. Effort = Work input / distance = 1250/10 = 125 N.

This question belongs to: Science Physics

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