second law is the real law …

Hi

We shall derive the 1st and the 3rdlaw of motion fron the 2nd law. |Derivation of 1st law| According to Newton’s 2 nd law of motion, F = ma Where, F is the force applied, m is the mass of the body and a is the acceleration of the body. So, In absence of a force, F = 0 => ma = 0 => a = 0 Since, m cannot be zero for a body. Zero acceleration means, body at rest will remain at rest and a body in uniform motion will continue its uniform motion. Which is Newton’s 1st law of motion. |Derivation of 3rd law| Consider an isolated system of two bodies A and B. An isolated system is such that no force acts on the system. This is the Newton’s third law of motion for a body exerting some force on another. Thus, Newton’s 2nd law of motion is the most basic law of motion.