A ball is thrown downward with an initial speed of from a high balcony

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

Problem

A ball is thrown downward with an initial speed of

4\,\text{m}\,\text{s}^{-1}

from a high balcony. Take upward as the positive direction and

g=10\,\text{m}\,\text{s}^{-2}

. What is the ball’s velocity after

2\,\text{s}

? (a)

+16\,\text{m}\,\text{s}^{-1}

(b)

-24\,\text{m}\,\text{s}^{-1}

(c)

+24\,\text{m}\,\text{s}^{-1}

(d)

-20\,\text{m}\,\text{s}^{-1}