Suppose the height of a falling object, in feet above the ground, is given by $h(t) = {-16t^{2}+16}$ for $t \geq 0$, where time is measured in seconds.

1. What is the velocity of the object? Include units in your answer.
   • units
2. What is the velocity of the object when it hits the ground? Include units in your answer.
   • units
3. What is the acceleration of the object? Include units in your answer.
   • units