Question

a car slows down from 40 m/s to 0 m/s in 50 seconds. what is its acceleration in m/s²?

Explanation:

Step1: Identify the formula

The formula for acceleration is $a=\frac{v - u}{t}$, where $v$ is final - velocity, $u$ is initial - velocity, and $t$ is time.

Step2: Assign values to variables

Here, $u = 40\ m/s$, $v = 0\ m/s$, and $t = 50\ s$.

Step3: Substitute values into the formula

$a=\frac{0 - 40}{50}=\frac{- 40}{50}=-0.8\ m/s^{2}$

Answer:

$-0.8\ m/s^{2}$