The kinetic energy of an object can be calculated using the formula:
Kinetic Energy = 0.5 * mass * velocity^2
In this case, the mass of the stone is given as 1 kg, and the velocity is given as 14 m/s. Plugging these values into the formula:
Kinetic Energy = 0.5 * 1 kg * (14 m/s)^2 = 0.5 * 1 kg * 196 m^2/s^2 = 98 Joules
Therefore, the approximate kinetic energy of the stone is 98 Joules.