Physicshard · Past Paper
A hydraulic machine has a velocity ratio of 5. If an effort of 100 N is applied to lift a load of 450 N, what is the efficiency?
A90%
B80%
C100%
D45%
✓ Correct Answer: A — 90%
MA = Load/Effort = 450/100 = 4.5. Efficiency = (MA/VR) * 100% = (4.5/5) * 100 = 90%.
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