Multiple choice The velocity of a body on reaching the ground from a height h, is 2 $\sqrt{gh}$ $\sqrt{gh}$ $\sqrt{2gh}$ 2g $\sqrt{h}$ Reveal answer Fill a bubble to check yourself C Correct answer Explanation Using the conservation of energy, potential energy mgh is converted to kinetic energy (1/2)mv^2. Solving for v gives v = sqrt(2gh).