A chain of mass ‘M’ and length ‘L’ is put on a rough horizontal surface and is pulled by constant horizontal force ‘F’ as shown in figure. Velocity of chain as it turns completely: (Coefficient of friction = µ)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Let point of application of force have moved by distance 'dx'.
∴ Work done by friction
W f = 
⇒ W f = – Mg λ
W f = 2F λ
∴ W net = 2FL – μ MgL ⇒ 
Mv 2 = 2FL – μ MgL
⇒ v = 
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