Question

A ball roll off the top of stairway with a constant horizontal velocity u , . If the step are ( h ) meter height and ( w ) meter wide , show that the ball will just hit the edge of Nth step if n = 2h u square / g w square.

PLEASE GIVE RIGHT ANSWER​

Answer 1

Answer:

Explanation:

Horizontal distance covered by ball =nb

Vertical distance covered by ball =nh

If the time taken to hit the edge of nth step is t, then

nb=ut

nh=12gt2

Eliminating t, we get,

nh=12g(nbu)2

n=2hu2gb2

Hence B is the correct answer.

Answer 2

Explanation:

Your answer refer in Attachment

Thank you