Laws Of Motion Question 163

Question: One end of a massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360 N. with what value of minimum safe acceleration (in ms2) can a monkey of 60kg move down on the rope[AIEEE 2002]

Options:

A) 16

B) 6

C) 4

D) 8

Show Answer

Answer:

Correct Answer: C

Solution:

If monkey move downward with acceleration a then its apparent weight decreases. In that condition Tension in string =m(ga) This should not be exceed over breaking strength of the rope i.e. 360m(ga) therefore36060(10a)

therefore a4 m/s2



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