Rotation 5 Question 17
29. When is brought in contact with , they acquire a common angular velocity in time . The average frictional torque on one disc by the other during this period is
(a)
(b)
(c)
(d)
(2007, 4M)
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Answer:
Correct Answer: 29. (a)
Solution:
- Let
be the common velocity. Then from conservation of angular momentum, we have
From the equation,
angular impulse