Life on a Rotating Platform
¥From perspective of person not on merry-go-round, path of ball is straight.
¥From perspective of person on merry-go-round, path of ball deflects to left. There is an apparent force.
(left click picture for animation)         World Weather Project 2010 Courtesy of M. Ramamurthy         U of Illinois, Urbana-Champaign
Merry Go Round Link
Play carousel for 3-4 loops. As the animation loops, point out that
The ball goes straight relative to ground (straight line shadows)
But it appears to curve from perspective of someone on the carousel