prove that newton's second law of motion is called real law of motion?
Asked by abhishek kapoor | 11th Sep, 2013, 02:29: PM
We shall derive the 1 st and the 3 rd law of motion fron the 2 nd law.
Derivation of 1 st law:
According to Newtons 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 Newtons 1 st law of motion.
Derivation of 3 rd 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 Newtons third law of motion for a body exerting some force on another.
Thus, Newtons 2 nd law of motion is the most basic law of motion.
We shall derive the 1 st and the 3 rd law of motion fron the 2 nd law.
Derivation of 1 st law:
According to Newtons 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 Newtons 1 st law of motion.
Derivation of 3 rd 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 Newtons third law of motion for a body exerting some force on another.
Thus, Newtons 2 nd law of motion is the most basic law of motion.
Answered by | 11th Sep, 2013, 02:32: PM
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