Question

question 12
2 pts
if an airplane accelerates from 30 mph to 90 mph in 5 sec. what is its acceleration rate?
12
6
18

Explanation:

Step1: Recall acceleration formula

Acceleration \( a = \frac{\Delta v}{\Delta t} \), where \( \Delta v \) is change in velocity, \( \Delta t \) is time.

Step2: Calculate change in velocity

\( \Delta v = 90 - 30 = 60 \) mph.

Step3: Calculate acceleration

\( \Delta t = 5 \) sec. So \( a = \frac{60}{5} = 12 \) (units: mph per sec, but we just need the numerical value here).

Answer:

12 (Assuming the options are numerical values, the correct one is 12. If options were labeled, e.g., A. 12, B. 6, C. 18, then the answer would be A. 12)