Center of mass is a common topic in physics courses. It appears in relation to studies of stable and unstable equilibrium, momentum, and rotation. Science products suppliers frequently include gadgets that demonstrate the concepts of center of mass and stability, such as the classic balancing bird. Additionally, The Physics Teacher has featured articles studying the center of mass of a rotating baton, locating the center of mass of a hanging Slinky toy, and describing a wide range of interesting systems.

1.
M.
Bucher
,
Z.
Shengbo
, and
R.
Dotta-Dovidio
, “
Center of mass baton
,”
Phys. Teach.
29
,
74
(
Feb.
1991
).
2.
T.
Toepker
, “
Center of mass of a suspended Slinky: An experiment
,”
Phys. Teach.
42
,
16
(
Jan.
2004
).
3.
E.
McFarland
, “
Center of mass revisited
,”
Phys. Teach.
21
,
42
(
Jan.
1983
).
4.
Links to examples of the water cone pool toy (a.k.a. “bucket dump”) in action: https://youtu.be/Is6yzP31H7M, https://vimeo.com/173851451, and https://youtu.be/jEYU8yStEFw.
5.
J.
Taylor
,
Classical Mechanics
(
University Science Books
,
2005
), pp.
87
89
.
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