Question

a rollercoaster car rapidly picks up speed as it rolls down the slope, its speed is 4 m/s. but 3 seconds later, its speed is 22 m/s. what is its average acceleration?
264 m/s²
-6 m/s²
20.7 m/s²
6 m/s²

Explanation:

Step1: Identify the formula for average acceleration

Average acceleration $a=\frac{v - u}{t}$, where $v$ is final - velocity, $u$ is initial - velocity, and $t$ is time.

Step2: Determine the values of $v$, $u$, and $t$

Given $u = 4\ m/s$, $v = 22\ m/s$, and $t = 3\ s$.

Step3: Substitute the values into the formula

$a=\frac{22 - 4}{3}=\frac{18}{3}=6\ m/s^{2}$

Answer:

$6\ m/s^{2}$