Question

explain Newton's first law from mathematical expression of second law

Answer 1

$\huge\textbf{Newton's First Law :}$


$\textbf{Law of Inertia}$ is the First Law of Newton.

According to it an object at rest remains at rest, object in uniform motion remains in uniform motion until or unless an external force is applied on it.

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$\huge\textbf{Expression :}$


From Second law.

F = ma

If F (external) = 0

Then;

ma = 0

But, m ≠ 0

So,

a = 0

v = constant

That is if F (external) = 0, v = constant.

Velocity remains constant until or unless external force is applied on it, which is Newton's First Law..

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Answer 2

Hello Mate,

Law of Inertia is the First Law of Newton÷

According to it an object at rest remains at rest, object in uniform motion remains in uniform motion until or unless an external force is applied on it.....

Expression : 


From Second law÷

F = ma

If F (external) = 0

Then;

ma = 0

But, m ≠ 0

So, 

a = 0

v = constant

That is if F (external) = 0, v = constant.

Velocity remains constant until or unless external force is applied on it, which is Newton's First Law.........


Hope this helps you