Question

derive newtons 1st Law from the 2nd Law

Answer 1

Hii
Acc. to 1st law of motion,
☆No force is required to maintain the state of rest.

From 2nd law of motion
☆ F = ma ☆
If an object is in rest, then
acceleration (a) = 0
So, F = ma
= m × 0
F = 0

Acc. to 1st law of motion,
☆No force is required to maintain the uniform motion,

From 2nd law of motion,
☆ F = ma ☆
And for uniform motion,
acceleration(a) = 0
F = ma
= m × 0
F = 0
Hence it is clear from the above deduction that no force is required to maintain the state of rest and to maintain the uniform motion which is the first law of motion.
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Answer 2

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• Newton 's first law of motion states that a body continues to remain in its rest state or a uniform motion along a straight line endless acted upon by external unbalanced force it is also called Law of inertia.

• Newton ' s second law of motion states that external force acting on an object is directly proportional to rate of change of its momentum