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A ball rolls

off the top of a stairway horizontally with a velocity of 4.5 m s¯¹.
Each step is 0.2 m high and 0.3 m wide. If g is 10 m s ¯² then the ball
will strike the edge of nth step where n is equal to ……………………………


Let It strikes nth step edge.
So 4.5*t=0.3*n  => t=n/15

1/2 * g * t^2 = 0.2*n

5 * n^2/225 = 0.2*n


1 5 1
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