Answer:
the kinetic energy of the brick before it reaches the ground is 117.6 J.
Explanation:
Given;
mass of the brick, m = 2 kg
height of the building, h = 6 m
The kinetic energy of the brick before it reaches the ground is maximum.
Based on the principle of conservation of energy, the maximum potential energy = maximum kinetic energy
K.E = P.E = mgh
where;
g is the acceleration due to gravity = 9.8 m/s²
K.E = 2 x 9.8 x 6
K.E = 117.6 J
Therefore, the kinetic energy of the brick before it reaches the ground is 117.6 J.
