A stone of mass is dropped from rest from a balcony above the ground

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

Problem

A stone of mass

2\,\text{kg}

is dropped from rest from a balcony

20\,\text{m}

above the ground. Neglect air resistance and take

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

. Find the speed of the stone just before it reaches the ground. (a)

40\,\text{m/s}

(b)

10\,\text{m/s}

(c)

20\,\text{m/s}

(d)

14\,\text{m/s}