Why second law of motion is …
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Posted by Rahul Bisht 7 years, 2 months ago
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Yogita Ingle 7 years, 2 months ago
We shall derive the 1st and the 3rd law of motion fron the 2nd law.
Derivation of 1 st 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.
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