A stone is dropped from the edge of a cliff

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

Problem

A stone is dropped from the edge of a cliff. It covers

25\,\text{m}

in the last

1\,\text{s}

of its fall before hitting the ground. Neglect air resistance and take

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

. What is the height (in metres) of the cliff? (a)

25

(b)

60

(c)

45

(d)

31.25