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.

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?

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