Question

A ball is projected vertically upwards. Its speed at
half of maximum height is 30 m/s. Maximum height
attained by the ball is
(1) 60 m
(2) 40 m
(3) 30 m
(4) 90 m
​

Answer 1

Answer:90m

Explanation:

After taking ratio of total energy of both case, when the ball is halfway and when it is full way, we get the/2=1/2v^2, where v=30m/s. Hence, h=90m