Which of the following gives the correct mathematical expression for average velocity…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Which of the following gives the correct mathematical expression for average velocity

v_{\text{avg}}

of a particle moving from position

x_i

to

x_f

in time

\Delta t

? (a)

v_{\text{avg}}=\dfrac{|\Delta x|}{\Delta t}

(b)

v_{\text{avg}}=\dfrac{x_f+x_i}{2\,\Delta t}

(c)

v_{\text{avg}}=\dfrac{\Delta x}{\Delta t}

(d)

v_{\text{avg}}=\dfrac{\text{distance travelled}}{\Delta t}

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