Question

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down theslope, its speed is 5 m/s. But 4 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?​

Answer 1

Answer: 4.25 m/s^2.

Explanation: We can use the following formula to calculate the average acceleration:

average acceleration = (final velocity - initial velocity) / time

where the initial velocity is 5 m/s, the final velocity is 22 m/s, and the time is 4 seconds.

Substituting these values in the formula, we get:

average acceleration = (22 m/s - 5 m/s) / 4 s

average acceleration = 17 m/s / 4 s

average acceleration = 4.25 m/s^2

Therefore, the average acceleration of the roller coaster car is 4.25 m/s^2.