Rankers Physics
Topic: Laws of Motion
Subtopic: Linear Momentum and Second Law of Motion

A fireman wants to slide down a rope. The rope can bear a tension of (3/4)th of the weight of the man. With what minimum acceleration should the fireman slide down:
g/3
g/6
g/4
g/2

Solution:

According to the question, T=3mg/4

Using equations of motion, i.e. Fnet = m.a

⇒mg-T =ma

⇒mg-3mg/4= ma

⇒a =g/4

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