COMEDK · Physics · 5. Laws of Motion
With what minimum acceleration can a fireman slide down a rope while breaking strength of the rope is \(\dfrac{2}{3}\) of the weight?
- A \(\dfrac{2}{3} g\)
- B \(g\)
- C \(\dfrac{1}{3} g\)
- D zero
Answer & Solution
Correct Answer
(C) \(\dfrac{1}{3} g\)
Step-by-step Solution
Detailed explanation
Let \(m\) be the mass of the fireman and \(g\) be the acceleration due to gravity. The weight of the fireman is \(W = mg\). The breaking strength of the rope is given as \(T_{max} = \dfrac{2}{3} mg\). When the fireman slides down with an acceleration \(a\), the equation of…
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