How can Newton’s first law of motion be deduced from Newton’s second law of motion? Prove.

DhirajProficient

# How can Newton’s first law of motion be deduced from Newton’s second law of motion? Prove.

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## Arjun

From second law of motion,

F = ma

or, F = m(v-u)/t

or, Ft/m = v-u

when, F = 0

then, v-u = 0

or, v = u

Clearly, when external applied force is 0, then there is no change in its state of motion or of rest which is the first law of motion.