An object thrown in the air has a velocity after t seconds that can be described by v (t) = -9.8t + 24 (in meters/second) and a height h (t) = -4.9 t 2 + 24t + 60 (in meters) . The object has mass m = 2 kilograms. The kinetic energy of the object is given by K = __1 2m v 2 , and the potential energy is given by U = 9.8mh. Find an expression for the total kinetic and potential energy K + U as a function of time. What does this expression tell you about the energy of the falling object?