2. Solved Papers
  3. AFMC

AFMC AFMC Solved Paper-2011

  • question_answer
    With what minimum acceleration can a fireman slide down a rope while breaking strength of the rope is \[\frac{2}{3}\]of the weight?

    A) \[\frac{2}{3}g\]                                

    B) g

    C) \[\frac{1}{3}g\]                                

    D) Zero

    Correct Answer: C

    Solution :

    If man slides down with same acceleration, then its apparent weight decreases. For critical condition rope can bear only 2/3 of his weight. If a is the minimum acceleration. Then in the rope \[=m(g-a)\] = breaking strength \[m(g-a)=\frac{2}{3}mg\] \[a=g-\frac{2g}{3}=\frac{g}{3}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner