A stone is thrown vertically upward with a speed of from the top of a tower high

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

Problem

A stone is thrown vertically upward with a speed of

10\,\text{m/s}

from the top of a tower

20\,\text{m}

high. Taking upward as positive and

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

, determine the time after projection when the stone hits the ground at the foot of the tower. (a)

2.0\,\text{s}

(b)

3.2\,\text{s}

(c)

1.3\,\text{s}

(d)

3.0\,\text{s}