




As we have seen previously, the height reached by a thrown ball as a function of time is
h(t) = 32t  16t^{2}
h'(t) = 32  32t
h"(t) = 32
h"'(t) = 0
h"(t) < 0
The rate of change of velocity is negative.
h'(0) > h'(1) > h'(2), h(t) curves down.