A ball is projected vertically upward with an initial speed of 19.6 m/s

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

Problem

A ball is projected vertically upward with an initial speed of 19.6 m/s. Taking the upward direction as positive and

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

, at what time after projection does its velocity become zero? (a)

1\,\text{s}

(b)

2\,\text{s}

(c)

2.8\,\text{s}

(d)

4\,\text{s}