2-99
Two cars, A and B, are stopped for a red light beside each other at an intersection. The light turns green and the cars accelerate. Their velocity time graphs are shown in Figure 2 44. (The positive direction is "forward.")
a) At what time(s) do A and B have the same velocity?
(b) When does B overtake A? (Hint: Their displacements must be equal at that time and displacement can be found from a velocity time graph.)
(c) How far have the cars traveled when B overtakes A?
 
 
 
 
 
 


In a v vs t graph of the two moving objects they have the same velocity when:

(A)   The areas under the graphs are equal.
(B)   The slopes of the graphs are equal.
(C)   The graphs cross each other.