Dynamics Activity
Clay and Coat Hanger Demo


BHS -> Staff -> Mr. Stanbrough -> Physics -> Mechanics -> Newton's Laws -> Newton's First Law -> this page


To demonstrate the "objects at rest" part of Newton's First Law


coat hanger and 2 lumps of clay (large)


  1.  Bend the coat hanger into an "M" shape, and put a lump of clay on the 2 outside arms.
  2. The middle of the "M" rests on your head.
  3. Show that you can put the other lump toward the front by turning your head - the lumps remain at rest.


source: Hewitt, Conceptual Physics Teaching Guide, p. 20

last update November 7, 2007 by JL Stanbrough