Question on: JAMB Physics - 2008

The efficiency of the pulley system shown above is 80%. find the effort E required to lift the load of 1200N
A
275N
B
325N
C
375N
D
573N
Ask EduPadi AI for a detailed answer
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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