Rotation 3 Question 3

9. A small object of uniform density rolls up a curved surface with an initial velocity v. It reaches up to a maximum height of 3v24g with respect to the initial position. The object is

(2007,3 M)

(a) ring

(c) hollow sphere

(b) solid sphere

(d) disc

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Answer:

Correct Answer: 9. (d)

Solution:

  1. 12mv2+12IvR2=mg3v24g

I=12mR2

Body is disc.



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