# A ball rolls off the top of Stairway horizontally with a velocity of 4.5 M per second each step is 0.2 M and 0.3 M wide if she is 10 M per second square then the ball will strike the end step Where n is equal to?

##### 1 Answer

Mar 17, 2018

Considering that here

So,height of

so,we have a projectile projected from height

So,we can say if it took time

Given

so,

And,along horizontal direction, using

so,

or,

so,