High School

A car speeds up from [tex]$10.0 \, \text{m/s}$[/tex] to [tex]$30.0 \, \text{m/s}$[/tex] in [tex]5.00 \, \text{s}$[/tex].

What is the acceleration of the car?

A. [tex]8.00 \, \text{m/s}^2[/tex]
B. [tex]6.00 \, \text{m/s}^2[/tex]
C. [tex]28.0 \, \text{m/s}^2[/tex]
D. [tex]4.00 \, \text{m/s}^2[/tex]

Answer :

To find the acceleration of the car, we can use the formula for acceleration:

[tex]\[ \text{acceleration} = \frac{\text{final velocity} - \text{initial velocity}}{\text{time}} \][/tex]

Let's break it down step-by-step:

1. Identify the given values:
- Initial velocity ([tex]\(v_i\)[/tex]) = 10.0 m/s
- Final velocity ([tex]\(v_f\)[/tex]) = 30.0 m/s
- Time ([tex]\(t\)[/tex]) = 5.00 s

2. Substitute these values into the formula:

[tex]\[ \text{acceleration} = \frac{30.0 \, \text{m/s} - 10.0 \, \text{m/s}}{5.00 \, \text{s}} \][/tex]

3. Perform the subtraction in the numerator:

[tex]\[ 30.0 \, \text{m/s} - 10.0 \, \text{m/s} = 20.0 \, \text{m/s} \][/tex]

4. Divide the result by the time:

[tex]\[ \text{acceleration} = \frac{20.0 \, \text{m/s}}{5.00 \, \text{s}} = 4.00 \, \text{m/s}^2 \][/tex]

So, the acceleration of the car is [tex]\(4.00 \, \text{m/s}^2\)[/tex]. Therefore, the correct answer is [tex]\( \boxed{4.00 \, \text{m/s}^2} \)[/tex].