Physics 101- Introduction to Mechanics
April 1- Equilibrium






  A seesaw consists of a 4m board pivoted at the center.  A 28kg child sits on one end of the board.  Where should a 40kg child sit to balance the seesaw?

A board of mass m lays on the ground.  What is the magnitude of the force that you would have to exert to lift one end of the board barely off the ground (assuming that the other end still touches the ground)?
a) 2mg
b) mg
c) Depends on the length of the board
d) 1/2mg
e) Other


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Jeff Phillips
Loyola Marymount University
Spring 2002