On the​ moon, all​ free-fall distance functions are of the form​s(t)=0.81t^2 where t is in seconds and s is in meters. An object is dropped from a height of 200
meters above the moon. After 9 sec, consider parts​ (a) through​(d) below.
​a)
How far has the object​ fallen?
​b)
How fast is it​ traveling?
​c)
What is its​ acceleration?
​d)
Explain the meaning of the second derivative of this​ free-fall function.
