The figure below represents part of the performance date of a car owned by a proud physics student. (The horizontal axis is marked in increments of 5 s and the vertical axis is marked in increments of 10 m/s.)

(a) Write an equation for x as a function of time for each phase of the motion, represented by the segments 0a, ab, and bc. (Use the following variable as necessary: t.)
(b) What is the average velocity of the car between t = 0 and t = 25 s?

Transcribed Image Text:

V (m/s) 50 40 30 20 10 t (s)