Question

velocity and time information for a leftward - moving car are shown.

what is the magnitude (i.e., value) and direction of the acceleration?
magnitude = m/s/s (no - sign.)
direction = (tap field to change.)

Explanation:

Step1: Recall the acceleration formula

The formula for acceleration is \(a=\frac{v - v_0}{t - t_0}\). Here, \(v_0 = 20.0\space m/s\), \(v = 4.0\space m/s\), \(t_0=0.0\space s\), \(t = 4.0\space s\).

Step2: Substitute the values into the formula

$$
LATEXBLOCK0
$$

The magnitude is the absolute value of \(a\). So, \(|a| = 4.0\space m/s^2\). Since the car is moving leftward and decelerating (velocity is decreasing), the acceleration is in the opposite direction of motion (rightward).

Answer:

Magnitude = \(4.0\space m/s/s\)
Direction = rightward