The distance that a body, starting at rest, falls under gravity in t seconds is commonly given as , where . The equation can be modified to take account of the effects of air resistance, which will...

The distance that a body, starting at rest, falls under gravity in t seconds is commonly given as
, where
. The equation can be modified to take account of the effects of air resistance, which will vary with barometric pressure and other atmospheric conditions. Will a time–distance relationship that is obtained for a human dummy that falls from a height of some thousands of meters be useful in predicting the time–distance relationship for another dummy, or for a human, falling at another time from a similar height? Or is the situation comparable to that for the lawn roller data in Subsection 3.1.1, where the relationship is likely to be different for different lawns? [Humans have very occasionally survived falls from such heights. See