Q

A machine uses 400 N effort to lift a 1000 N load. If the effort distance is 5 m and load distance is 1 m, its efficiency is:

✓ Answer: B 50%
MA = 1000/400 = 2.5. VR = 5/1 = 5. Efficiency = (MA/VR) × 100 = (2.5/5) × 100 = 50%. Therefore, option B is correct.
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