The falling object that will result in the least kinetic energy when it collides with the ground is the one that has the lowest mass and falls from the lowest height. According to the kinetic energy formula (KE = 1/2 * m * v^2), the mass (m) and velocity (v) of the object contribute to its kinetic energy. Therefore, a lighter object falling from a lower height will have less kinetic energy compared to a heavier object falling from a greater height.
