A man throws balls into air one after another throwing one the other is at the highest point. How high the balls rise , if he throws twice a second ?

Explanation

Time taken by the ball to rach the highest point `= 1/2 sec`
From `v=u+gt, 0=u-10x1/2 or u =5 m//s`
From `v^2 = u^2+2as`, 0-25 = 2(-10)xs
`therefore = 1.25 m`