12. Free Fall 

Paul investigates and develops free-fall equations as Phil Physiker drops a boulder, with a speedometer attached, from a high cliff.

End Question:

We’ve talked about free fall in a short four-second interval. Question 1) What will be the speed of the boulder when it has fallen for 5 seconds? 2) How far from the top will it have fallen in 5 seconds? 3) What will be its acceleration at this 5th second?