Question

Deduce Newton’s first law from the second law.

Answer 1

This means that the object will continue moving with uniform velocity, u throughout the time, t. If u is zero then v will also be zero.

According to the second law, F = ma

If F = 0, a = 0 since m ≠ 0

But

$a = \frac{v \: - \: u}{t}$

or v-u =0 so, v- u for whatever time t is taken.

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