Since this is not my area of expertise, I searched Google under the key words "newtons first law" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=newtons+first+law&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
Whta is newtons first law?
2 answers
Newtons 1st law states dat an object will remain in its state of rest or continue with a constant velocity unless a resultant force acts on it