Question

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts

down the slope, its speed is 4 m/s. 3 seconds later, at the bottom of the slope,
its speed is 22 m/s. What is the cars acceleration?

Answer 1

a=6m/s^2
Since acceleration=final speed-starting speed/time
acceleration=22-4/3=6m/s^2