A car is traveling in a straight line along the $x$ axis. At time $t = 2.1 \mathrm {~s}$, the position is $x = 3.9 \mathrm {~m}$; and at time $t = 5.6 \mathrm {~s}$, the position is $x = 52.8 \mathrm {~m}$. The average velocity of the car is
A) 11 m/s.
B) 14 m/s.
C) 18 m/s.
D) 22 m/s.

Question

Quizplus · Accepted Answer

The average velocity is calculated by the change in position divided by the change in time, which is $\frac{52.8 \mathrm{~m} - 3.9 \mathrm{~m}}{5.6 \mathrm{~s} - 2.1 \mathrm{~s}} = \frac{48.9 \mathrm{~m}}{3.5 \mathrm{~s}} = 14 \mathrm{~m/s}$.

A Car Is Traveling in a Straight Line Along The x