Question

Sam is riding his bike and spots a sinkhole. He slows his bike from 14.0 m/s to 2.0 m/s on 6.0 seconds. What is the bikes negative acceleration?

Answer 1

By definition, average acceleration will be:
a=(v(f)-v(i))/t
a=(2-14)/6=-2 (m/s^2)
________
-2(m/s^2)

Answer 2

The bikes negative acceleration is -2(m/s^2)