b) What is pulley ?
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Answer:
ln English
piece of equipment, consisting of a wheel and a rope, that is used for lifting heavy things
In Hindi
गरारी, घिरनी, पुली (भारी सामान उठाने की मशीन जिसमें एक रस्सी और चरखी होती है)
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Explanation:
A wheel with a grooved rim around which a cord passes ,which acts to change the direction of a applied to the cord and is used to raise heavy weights......
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