A ball is launched straight upward with an initial speed of

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

20\,\text{m/s}

. Taking the downward direction to be negative and

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

, how much time elapses before the ball reaches its highest point? (a)

4.0\,\text{s}

(b)

1.0\,\text{s}

(c)

2.0\,\text{s}

(d)

2.5\,\text{s}