Originally Posted by prince8585
how the heck can a child sitting on a stationary
playground swing eventually pump herself up to a wide arc of swing,
sometimes almost high enough to loop-the-loop, and all without
touching her feet to the ground?
momentum, another discussion i found on www.tbpt.co.uk
the swing upwards leaning back, pointing the feet into the air, oh okay I can't explain it well enough to satisfy me