Physics

Problem

A student is deriving the relation

F = ma

for a body of constant mass. Starting with

F = \dfrac{\Delta p}{\Delta t}

, the student writes (i)

\Delta p = m(v - u)

(ii)

F = \dfrac{m(v - u)}{t}

(iii) ______ Which of the following should be written in blank (iii) so that the derivation is logically completed? a)

a = \dfrac{u - v}{t}

a = \dfrac{2\,(v - u)}{t}

a = \dfrac{v - u}{t}

a = \dfrac{v - u}{2t}