A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time? 
Given 
A
more than 19.6 
B
at least 9.8 
C
any speed less than 19.6 
D
only with speed 19.6 
Text Solution
Verified by ExpertsThe correct answer is:
A
Interval of ball thrown 
If we want that minimum three (more than two) balls remain in air then time of flight of first ball must be greater than 4 sec.
or 
Time of ascent 
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