Rearranging the letters of 'Isaac Newton's first law of motion' gives:
Wow, fools, inertia is constant! F = ma.
(by Aronas Pinchas) (2006) (pending approval)
Other related anagrams without their own page:
"Isaac Newton's first and second laws of motion." -> "So, don now finds it wants acceleration of mass." (by V.Rabin by hand) (2006) (pending approval)
"Isaac Newton's first and second laws of motion." -> "A don wants mass/ force definitions : wasn't cool." (by V.Rabin by hand) (2006) (pending approval)
"Newton's law of the gravity" -> "Now Earth gives want to fly." (by Aronas Pinchas) (2006) (pending approval)