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A ball collides at B with velocity 10m//...

A ball collides at `B` with velocity `10m//s` at `30^(@)` with vertical. There is a flag at `A` and a will at `C`. Collision of ball with groundis perfectly inelastic `(e=0)` and that with wall is elastic `(e=1)`. Given `AB = BC=10 m`. Find the time after which ball will collide with the flag.

A

4

B

5

C

6

D

Ball will not collide with the flag

Text Solution

Verified by Experts

The correct Answer is:
C
As horizontal velocity (i.e velocity along the surface) remains constant so required time `= (30)/(5) = 6s`
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