Question

A paperboy rode his bike at 3m/s. After being chased by a dog for 8 seconds, he was traveling 6m/s. What is his acceleration?

Answer 1

well v increased by 3 m/s in 8 seconds.

now, what is the definition of acceleration?

Answer 2

You would do the final velocity subtracted from the initial velocity, so 3 m/s - 6 m/s and you would get -3 m/s. Now you divide it from the time which is, 8 seconds and you would get -3 m/s divided by 8 seconds which will be approximately -0.375.