Question

a car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. what is the cars acceleration? 2 m/s² 15 m/s² 30 m/s² 50 m/s²

Explanation:

Step1: Identify acceleration formula

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

Step2: Substitute values

Given $v_i = 10\ m/s$, $v_f = 40\ m/s$, and $t = 15\ s$. Substitute into the formula: $a=\frac{40 - 10}{15}$.

Step3: Calculate

First, calculate the numerator: $40−10 = 30$. Then, divide by the denominator: $a=\frac{30}{15}=2\ m/s^2$.

Answer:

A. $2\ m/s^2$