The efficiency of the pulley system shown above... - JAMB Physics 2008 Question
A
275N
B
325N
C
375N
D
573N
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Correct Option: C
VR = No. of pulleys = 4
Efficiency = M.A/V.R x 100% = load
Effort x 100%_V.R
∴80 = 1200 x 100 x 1100__Effort4
∴ Effort = 1200 x 100 = 375N_80 x 4
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