runner starts from rest and with an acceleration of $2.0 \mathrm{~m} / \mathrm{s}^{2}$ travels a distance of 12 meters. The magnitude of the velocity of the runner at the end of the distance is
A) $7.5 \mathrm{~m} / \mathrm{s}$.
B) $3.4 \mathrm{~m} / \mathrm{s}$.
C) $5.7 \mathrm{~m} / \mathrm{s}$.
D) $6.9 \mathrm{~m} / \mathrm{s}$.
E) $8.1 \mathrm{~m} / \mathrm{s}$.

Question

Quizplus · Accepted Answer

Using the equation $v^2 = u^2 + 2as$, where $u = 0$, $a = 2.0 \, \mathrm{m/s}^2$, and $s = 12 \, \mathrm{m}$, we find $v = \sqrt{0 + 2 \times 2 \times 12} = \sqrt{48} = 6.9 \, \mathrm{m/s}$.

Runner Starts from Rest and with an Acceleration Of 2.0 m/s22.0 \mathrm{~m} / \mathrm{s}^{2}2.0 m/s2

Runner Starts from Rest and with an Acceleration Of $2.0 \mathrm{~m} / \mathrm{s}^{2}$