To determine which has the lower kinetic energy, we need to know the velocities of both the dog and the boy, as kinetic energy is given by the formula:
\[ KE = \frac{1}{2} mv^2 \]
where \( m \) is the mass and \( v \) is the velocity.
If you provide the velocities of both the dog and the boy, I can help you calculate their respective kinetic energies and determine which one is lower.