Laws of Motion - Result Question 36

36. 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 breaking the branch is

[1993]

(a) g

(b) 3g4

(c) g4

(d) g2

Topic 3: Friction

Show Answer

Answer:

Correct Answer: 36. (c)

Solution:

  1. (c) Let T be the tension in the branch of a tree when monkey is descending with acceleration a. Then mg−T=ma; and T=75 of weight of monkey,

∴ma=mg−(75100)mg=(14)mg

or a=g4.

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