15. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, it's speed is 4 m/s. 3 seconds later, at the bottom of the slope, its speed is 22 m/s.
What is the roller coaster car's average acceleration?
*
22 m/s/s
6 m/s/s
3 m/s/s
To find the roller coaster car's average acceleration, we can use the formula:
average acceleration = (final velocity - initial velocity) / time
In this case, the initial velocity is 4 m/s, the final velocity is 22 m/s, and the time is 3 seconds.
average acceleration = (22 m/s - 4 m/s) / 3 s
average acceleration = 18 m/s / 3 s
average acceleration = 6 m/s/s
Therefore, the roller coaster car's average acceleration is 6 m/s/s.