Newton's Third Law
In Newton's words,
To every action there is always opposed an equal reaction: or, the mutual
actions of two bodies upon each othere are always equal, and directed to
contrary parts.
That is,
If object A exerts a force F on object B,
then object B exerts a force F' on object A,
where F' is equal in magnitude to F
but directed in the opposite direction
![](newton3.gif)
or
![](newton3bis.gif)
How can Princess Lea save the Federation?
![](starwars.gif)
She has gone to Star School and knows
about physics.
ASTR 121 Home
Davison E. Soper, Institute of Theoretical Science,
University of Oregon, Eugene OR 97403 USA
soper@bovine.uoregon.edu