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Newton's 2nd Law can be written:
The Rate of change of momentum of a body is equal to the resultant force acting on the body, and takes place in the direction of the force.
In another form:
Force = mass x acceleration
In another form:
The sum of forces still acting against Prop 8 in California aren't going away! They're growing. Marriage Equality has Momentum!
For further information on what's happening, pop over to Lori Hahn's blog. She has the scoop.