A certain body on ground is thrown vertically upward with a velocity of $50$ m/s then the time of flight of a body neglecting the air resistance is ( $g = 10 m / s^{2}$ )

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Solution

The correct option is B $10$ s
Given,
$u = 50 m / s$
$v = 0 m / s$
$g = 10 m / s^{2}$
From 1st equation of motion,
$v = u - g t$
$0 = 50 - 10 t$
$10 t = 50$
$t = 5 s e c$
For the down way, more $5 s$ will required.
The time of flight is $T = 10 s e c$
The correct option is B.

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