Word Count : 239

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द्रव्यमान (m = 30 \text{ kg}) है तथा (g = 10 \text{ m s}^{-2})। बच्ची पर दो बल लगते हैं: (i) नीचे की ओर भार (W = mg) (ii) ऊपर की ओर लिफ़्ट के फर्श द्वारा लगाया गया अभिलंब बल (N) (i) लिफ़्ट का ऊपर की ओर त्वरण (a = 4.0 \text{ m s}^{-2}) ऊपर की दिशा को धनात्मक __________ _______ ______ _____ ________ _______ ______ _________ _______ ____ __________.
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