Question

As the shuttle bus comes to a sudden stop to avoid hitting a dog, it accelerates uniformly at -4.1 m/s² as it slows from 9.0 m/s to 0 m/s. Find the time interval of acceleration for the bus.

Answer 1

initial velocity = 9

acceleration is derivative of velocity
--> v(t) = 9 - 4.1t

set v(t) = 0 and solve for t