13. 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. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
a. 0.06 m/s
b. 0.06 m/s2
c. 6 m/s
d. 6 m/s2 14.

A Ferrari travels at 10 m/s and speeds up to a rate of 50 m/s in 2 seconds, what will be its acceleration?
a. 2 m/s
b. 2 m/s2
c. 20 m/s
d. 20 m/s2

15. A ball is rolled at a velocity of 12 m/sec. After 3 sec, it speeds up to 17 m/s. What is the acceleration of the ball?
a. 1.67 m/s
b. 1.67 m/s2
c. 16.7 m/s
d. 16.7 m/s2

Answer this w/ solution.​