Posted by: confused November 1, 2004
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there is no 4th law of motion :)
the three laws of motion are
every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it
force is equal to the change in momentum per chanve in time. and also F = ma...force equals accelaration time mass..
for every action there is an equal and opposite re action.....
:)