Mechanics > Newton's Laws > Newton's Second Law > Accelerated Reference Frames
DCS# 1G20.38

EINSTEIN TOY

einstein toy

APPARATUS
Einstein toy
202-14-C


DESCRIPTIONeinstein toy
It is difficult to get the ball into the cup, unless you drop the whole thing -- in free fall the spring pulls the balls in nicely every time.  This illustrates the principle of equivalence.  (Eric Rogers gave such a toy to Einstein.)
-JLS