A rock is allowed to fall freely from rest for

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

3\,\text{s}

. With downward taken as positive and

g = 9.8\,\text{m/s}^2

, determine its speed at the end of the

3\,\text{s}

interval. (a)

14.7\,\text{m/s}

(b)

29.4\,\text{m/s}

(c)

44.1\,\text{m/s}

(d)

9.8\,\text{m/s}