manual

14
The center of gravity of an object always tends downward.
The body appears to go up, but actually its
center of gravity is going down, falling
between the arms as the cone rolls.
The wider apart they are, the
greater the effect.
center of gravity
resting point of the cone
on the arms
red line: where the center
of gravity moves
10 in. (25 cm)
Every object has a point, called its center of gravity, which is the point
where you can imagine that its weight is concentrated.
A body starts moving when its
center of gravity lowers
because of the force of gravity.
The edges of the double cone
roll upward on the arms, but
most of the double cone’s
mass (center of gravity) is
really rolling down in the
space between the arms.