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PHYSICS

JAMB 2008 - Question 14

Physics 2008 JAMB Past Questions - Question 14: The efficiency of the pulley system shown above is 80%.Find the effort E required to lift a load of 1200N.

Use the diagram to answer question that follows

The efficiency of the pulley system shown above is 80%.Find the effort E required to lift a load of 1200N.

A: 275N

B: 325N

C: 375N

D: 573N

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Correct Answer

Explanation

M.A = EXV.R/100 = 80 X 4/100 =3.2E = L/M.A = 1200/3.2 = 375N