https://www.youtube.com/watch?v=2cVEilIOmxM&t=21s https://www.youtube.com/watch?v=lYxwJVKxFFM&t=87s Share this:TwitterFacebookLike this:Like Loading... Share Post navigation Video 2 11thA, scope of the physics, classical physics, modern physics 11th class Fundamental forces, Conservatives law in basic