A ball is thrown vertically downward from the top of a high tower with an initial speed of

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

Problem

A ball is thrown vertically downward from the top of a

40\,\text{m}

high tower with an initial speed of

5\,\text{m/s}

. Taking downward as the positive direction and

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

, how much time (in seconds) will the ball take to reach the ground? (a)

3.0

(b)

4.0

(c)

2.4

(d)

1.8