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) = -4.9t 2 + 24t + 60 (in meters). The object has mass m = 2 kilograms. The kinetic energy of the object is given by K = __1 2mv2 , 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?
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![K=\frac{1}{2}.2.[v(t)]^{2}](/tpl/images/0766/5290/9bd09.png)
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An object thrown in the air has a velocity after t seconds that can be described by v(t) = -9.8t + 2...
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