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NEET 1993 (AIPMT) · Apparent Weight & Lift

Apparent Weight & Lift question from NEET 1993 (AIPMT)

Q25NEET 1993 · AIPMTMedium

Apparent Weight & Lift

A monkey is decending from the branch of a tree with constant acceleration. If the breaking strength is 75% of the weight of the monkey, the minimum acceleration with which monkey can slide down without branch is

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Answer: (c)

  1. Sliding down: mg−T=ma⇒T=m(g−a)mg - T = ma \Rightarrow T = m(g - a).
  2. Safe if T≤0.75 mgT \le 0.75\,mg: m(g−a)≤3mg4⇒a≥g4m(g - a) \le \frac{3mg}{4} \Rightarrow a \ge \frac{g}{4}
  3. So the answer is (c) g4\frac{g}{4}.
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