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 5m, the number of ball thrown per minute is (take $g=10\text{\hspace{0.17em}}m{s}^{-2}$

(1) 120

(2) 80

(3) 60

(4) 40

Concept Videos :-

#26-Equations-for-Uniform-Acceleration
#27-Equations for Uniform Acceleration 28Calculus Method29
#28-Sign Convention
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Concept Questions :-

Uniformly accelerated motion
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