Answer:
option A
Explanation:
given,
height of the drop of stone = 9.44 m
speed of the stone = ?
As the stone is dropped the energy of the stone will be conserved.
using conservation of energy.
Potential energy = Kinetic energy
[tex]m g h = \dfrac{1}{2} m v^2[/tex]
[tex]v = \sqrt{2gh}[/tex]
[tex]v = \sqrt{2\times 9.8 \times 9.44}[/tex]
[tex]v = \sqrt{185.024}[/tex]
v = 13.60 m/s
Hence, the correct answer is option A
