7. [-/2 Points] DETAILS WACOLPHYSAV1 2.P.028. MY NOTES ASK YOUR TEACHER Starting from rest, a truck travels in a straight line for 9.0 s with a uniform acceleration of +2.0 m/s. The driver then applies the brakes for 3.0 s, causing a uniform acceleration of -2.0 m/s over that time. (a) What is the truck's speed (in m/s) at the end of the braking period? m/s (b) What is the total distance traveled by the truck in meters (from the point where it started at rest to the end of the braking period)? m Submit Assignment Save Assignment Progress