Select the correct answer.

A motorcycle is moving at a constant velocity of 15 meters/second. It then starts to accelerate and reaches a velocity of 24 meters/second in 3 seconds. What is the acceleration of the motorcycle over this time? Use [tex]a=\frac{v_f - v_i}{t}[/tex].

A. [tex]9 \, \text{m/s}^2[/tex]

B. [tex]8 \, \text{m/s}^2[/tex]

C. [tex]6 \, \text{m/s}^2[/tex]

D. [tex]5 \, \text{m/s}^2[/tex]

E. [tex]3 \, \pi \, \text{m/s}^2[/tex]



Answer :

To find the acceleration of the motorcycle, we will use the formula for acceleration:

[tex]\[ a = \frac{v_f - v_i}{t} \][/tex]

where:
- [tex]\( v_f \)[/tex] is the final velocity,
- [tex]\( v_i \)[/tex] is the initial velocity, and
- [tex]\( t \)[/tex] is the time over which the change in velocity occurs.

Let's go through the values given in the problem:
- The initial velocity ([tex]\(v_i\)[/tex]) of the motorcycle is [tex]\(15\)[/tex] meters/second.
- The final velocity ([tex]\(v_f\)[/tex]) of the motorcycle is [tex]\(24\)[/tex] meters/second.
- The time ([tex]\(t\)[/tex]) over which the velocity change occurs is [tex]\(3\)[/tex] seconds.

Now we substitute these values into the formula:

[tex]\[ a = \frac{24 \, \text{m/s} - 15 \, \text{m/s}}{3 \, \text{s}} \][/tex]

Perform the subtraction in the numerator:

[tex]\[ a = \frac{9 \, \text{m/s}}{3 \, \text{s}} \][/tex]

Then, perform the division:

[tex]\[ a = 3 \, \text{m/s}^2 \][/tex]

So, the acceleration of the motorcycle is [tex]\(3\)[/tex] meters per second squared. This corresponds to the numerical value associated, which is:

[tex]\[ 3 \, \text{m/s}^2 \][/tex]

Therefore, the correct answer is:

E. [tex]\(3 \, m/s^2\)[/tex]