69. Two cars travel along a straight road. When a stopwatch reads t = 0.00 h, car A is at xa = 48.0 km moving at a
constant speed of 36.0 km/h. Later, when the watch
reads t = 0.50 h, car B is at Xp = 0.00 km moving at
48.0 km/h. Answer the following questions, first
graphically by creating a position-time graph and
then algebraically by writing equations for the posi-
tions xa and xp as a function of the stopwatch time (t).
a. What will the watch read when car B passes car A?
b. At what position will car B pass car A?
c. When the cars pass, how long will it have been
since car A was at the reference point?