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A ball rolls off the top of a staircase ...

A ball rolls off the top of a staircase with a horizontal velocity `u ms^-1`. If the steps are `h` metre high and `b` metre wide, the ball will hit the edge of the `nth` step, if.

A

`n = ( 2hu ^(2))/(gb)`

B

`n = ( hu ^(2))/(gb ^(2))`

C

`n = ( 2 hu )/(gb ^(2))`

D

`n = ( 2hu ^(2))/(gb ^(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
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