A ring of mass M and radius R sliding with a velocity v 0 suddenly enters into rough surface where coefficient of friction is μ , as shown -
A
The ring starts rolling motion when centre of mass becomes stationary
B
The ring starts rolling motion when the point of contact becomes stationary
C
The time after which the ring starts rolling is 
D
The rolling velocity is 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(b, c, d)
Let rolling velocity is v and angular velocity is ω then,
v = v 0 – μ gt .... (1)
and ω = 
...(2)
Also, v = r ω
∴ μ gt = v 0 – μ gt ⇒ t = 
and v = 
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