Problem 2-101 - Linear Kinematics - Part 2 - (a)

A car (c) with one headlight burned out is traveling at a constant speed of 18m/s and passes a stopped police car (p). The car is pursued immediately by the police cruiser, which has a constant acceleration of magnitude 2.2m/s2.

(a) How far does the police cruiser travel before catching the other car?
(b) At what time will this occur? (Hint: Graphing may help to visualize this problem.)


Correct!

graphs indicating where the police cruiser intercepts the card with one head light

The expression relating the car's displacement (xc) to the time (t) is BEST represented by:
 
(A)   xc=x0c+v0ct,withx0c=0

(B)   x_c = x_{0c} + v_{0c^t} + ½\; at^2,\text{with} \; x_{0c} = 0