Falling rock, ex. 24, p. 32
This is the same kind of thing that got Pippin in trouble in the Mines of Moria.  How far does the rock fall - how far away is trouble?  Exercise 24, p. 32 will help you get a lock on the drop distance formula:
       d = (1/2) g t2
Monday, July 2, 2007
Rock fall, ex. 24, p. 32