Question

6 multiple choice 0.5 points what is the average velocity from c (20 s, 38 m) to d (30 s, 0 m)? table 2.1 position of the car at various times position t (s) x (m) a 0 30 b 10 52 c 20 38 d 30 0 e 40 -37 f 50 -53 options: +0.38 m/s, -0.38 m/s, -3.8 m/s, +3.8 m/s

Explanation:

Step1: Recall average velocity formula

Average velocity: $\bar{v} = \frac{\Delta x}{\Delta t} = \frac{x_f - x_i}{t_f - t_i}$

Step2: Identify given values

$x_i = 38\ \text{m}$, $t_i = 20\ \text{s}$, $x_f = 0\ \text{m}$, $t_f = 30\ \text{s}$

Step3: Substitute values into formula

$\bar{v} = \frac{0 - 38}{30 - 20} = \frac{-38}{10}$

Step4: Calculate the result

$\bar{v} = -3.8\ \text{m/s}$

Answer:

-3.8 m/s