Question

Derive third equation of motion algebrbrically

Answer 1

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Newton's Third equation of motion

✒ We know that

✒ v = u + at

✒ Squaring both sides

✒ v² = ( u + at )²

✒ v² = u² + 2uat + a²t²

✒ v² = u² + 2a ( ut + 1/2 at² )

✒ From second equation of motion we know that ( ut +1/2 at² ) = s

✒ v² = u² +2as

Third equation of motion

✏ v² = u² + 2as

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