A ball is thrown vertically upwards with initial velocity 25 m/s. Displacement of ball in 3rd sec is $(m) [g = 10 m / s^{2}]$

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Solution

The correct option is D 5
using $s = u t - \frac{g t^{2}}{2}$
$s_{3 t h} = s_{3} - s_{2}$
$s_{3 t h} = 25 (3 - 2) - \frac{10 (3^{2} - 2^{2})}{2}$
$s_{3 t h} = 25 - 20$
$s_{3 t h} = 5 m$

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