How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m? (gravity is 9.8)

First, calculate the initial velocity of the dog given with the vertical height and the acceleration due to gravity which is calculated through the equation,
                         2ad = Vo²
Substituting the known values,
                           2(9.8 m/s²)(1.2 m) = V₀²
                                V₀ = 4.85 m/s
The kinetic energy is solved through the equation, 
                         KE = 0.5mv²
Substituting the known values to the latest equation,
                         KE = 0.5 (7.2 kg)(4.85 m/s)²
                          KE = 17.46 J
Thus, the kinetic energy is 17.46 J.