Question

1. mia slowed her bmx bike as she approached the street. she went from 10 m/s to 2 m/s in a period of 2 seconds. what was her acceleration (in m/s²)?

Explanation:

Step1: Identify the formula for acceleration

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

Step2: Substitute the given values

Given $u = 10\ m/s$, $v = 2\ m/s$, and $t = 2\ s$. Substitute these values into the formula: $a=\frac{2 - 10}{2}$.

Step3: Calculate the acceleration

First, calculate the numerator: $2-10=-8$. Then, divide by the denominator: $a=\frac{-8}{2}=-4\ m/s^{2}$.

Answer:

$-4\ m/s^{2}$