Question

question 3 (3 points) (02 02 mc) a car increases from 15 km/s to 45 km/s in 5 seconds. calculate the average acceleration of the car during these 5 seconds. a 6 km/s² b 12 km/s² c 30 km/s² d 60 km/s²

Explanation:

Step1: Identify initial and final velocities and time

Initial velocity $u = 15$ km/s, final velocity $v=45$ km/s, time $t = 5$ s.

Step2: Use acceleration formula

The formula for average acceleration $a=\frac{v - u}{t}$. Substitute the values: $a=\frac{45 - 15}{5}$.

Step3: Calculate the acceleration

$a=\frac{30}{5}=6$ km/s².

Answer:

a. 6 km/s²