A very large number of balls are thrown vertically upwards in quick succession in such a way that the next ball is thrown when the previous one is at the maximum height. If the maximum height is $5\, m$, the number of balls thrown per minute is (take $g = 10\, ms^{-2}$) :-
A very large number of balls are thrown vertically upwards in quick succession in such a way that the next ball is thrown when the previous one is at the maximum height. If the maximum height is $5\, m$, the number of balls thrown per minute is (take $g = 10\, ms^{-2}$) :-
- A
$120$
- B
$80$
- C
$60$
- D
$40$
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