Physics-
Consider a disc rotating in the horizontal plane with a constant angular speed
about its centre
. The disc has a shaded region on one side of the diameter and an unshanded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles
and
are simultaneously projected at an angle towards
. The velocity of projection is in the
plane and is same for both pebbles with respect to the disc. Assume that i) they land back on the disc before the disc has completed
rotation. ii) their range is less than half the disc radius, and (iii)
remains constant throughout. Then

Physics-General
lands in the shaded region and
in the unshaded region
lands in the unshaded region and
in the shaded region
- Both
and
land in the unshaded region
- Both
and
land in the shaded region
Answer:The correct answer is:
lands in the shaded region and
in the unshaded region
To reach the unshaded portion particle
needs to travel horizontal range greater than
or
but its range is less than
. So it will fall on shaded portion
is near to origin, its velocity will be nearly along
so its will fall in unshaded portion
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