Question

A roller coaster car rapidly picks up speed as it Rolls down the slope. As it starts down the slope, its speed is 4 m/s. but three seconds later, at the bottom of the slope, its speed is 22 m/s what is the average acceleration?

Answer 1

The average acceleration is 6 m/s. Its speed was 4 m/s, but at the bottom, it was 22 m/s. Therefore, it accelerated 18 m/s in 3 seconds. If you divide 18 by 3, you will find out that its average acceleration 6 m/s.