Question on: JAMB Physics - 2001
A
60%
B
50%
C
40%
D
33%
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Correct Option: B
Since the number of pulleys present is 6, it implies that the velocity ratio VR = 6
| ∴ efficiency = | M.A |
| |||
| V.R |
= Load/Effort x 1/V.R x 100/1
= 240/80 x 1/6 x 100/1
= 50%
∴ Efficiency = 50%
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