JEE Main Physics question
A man throws balls with the same speed vertically upwards one after the other at an interval of two seconds. What should be the speed of the throw so that more than two balls are in the sky at any time (Given m/s) [CBSE PMT 2003]
Answer: (D)
Solution
For more than two balls airborne at once, flight time must exceed twice the interval ( s): m/s.