Easy Explanations of Few Terms:
Newton's second law
It relates net force and acceleration. A net force on an object will accelerate it,that is, change its velocity.Force
It means an agency which make a thing to move.Frame of reference
It means any thing which we refer for certain position. It may be a room or side of a table. It may be intrpreted as a certain situation, place, envirnment or position.Scientific Laws
The statements which can be be proved universally.
External Links
(For that you have to put more time to search!)Visit Physics Answers Web site
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