Question

1. a car is traveling at 10 m/s then comes to a stop in 4 seconds. how far did the car travel?

Explanation:

Step1: Identify the formula

We use the formula for average - velocity $v_{avg}=\frac{v_i + v_f}{2}$ and then $d = v_{avg}\times t$. Here $v_i$ is the initial velocity, $v_f$ is the final velocity and $t$ is the time, $d$ is the distance.

Step2: Calculate the average velocity

Given $v_i = 10\ m/s$ and $v_f=0\ m/s$. Then $v_{avg}=\frac{10 + 0}{2}=5\ m/s$.

Step3: Calculate the distance

We know $t = 4\ s$ and $v_{avg}=5\ m/s$. Using the formula $d=v_{avg}\times t$, we get $d = 5\times4=20\ m$.

Answer:

$20\ m$