Rotation 5 Question 3
12. Consider a disc rotating in the horizontal plane with a constant angular speed
The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles
Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii)
(2012)
(a)
(b)
(c) both
(d) both
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Answer:
Correct Answer: 12. (*)
Solution:
- Language of question is not very clear. For example, disc is rotating. Its different points have different velocities. Relative velocity of pebble with respect to which point, it is not clear. Further, actual initial positions of
