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प्रश्न
A sheaf pulley system has ______.
विकल्प
efficiency more than 100%
multiplies speed
multiplies effort
both (a) and (b)
MCQ
रिक्त स्थान भरें
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उत्तर
A sheaf pulley system has multiplies effort.
Explanation:
A sheaf pulley system reduces the effort needed to lift a load, so it multiplies effort. Its efficiency cannot be more than 100%, and it does not multiply speed.
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