Quote:
Originally Posted by cliffordlj
As far as what daox said, 1 mph at 5 is not the same as 1 at 40 mph. The kenetic energy scales with the square of the speed. You can illustrate this by coasting up a hill and observing the vertical displacement will be significantly more as you slow from 40 to 20 as it will be from 20 to 0.
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If it takes an increasing amount of energy to gain each increment of speed, then why does gravity have a constant acceleration rate (9.8m/s/s) despite the increasing speed and constant force?