newton's law of motion

NOUN
22 LETTERS · STARTS WITH N

newton's law of motion is a valid 22-letter word worth 29 points in Scrabble and 34 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
N1E1W4T1O1N1'0S1L1A1W4O1F4M3O1T1I1O1N1
1 + 1 + 4 + 1 + 1 + 1 + 0 + 1 + 0 + 1 + 1 + 4 + 0 + 1 + 4 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does newton's law of motion mean?