Question

A red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to and x axis. At time t=0, the red car is at x_r=0 and the green car is at x_g=224 m. If the red car has a constant velocity of 21km/h, the cars pass each other at x=43.3m, and if it has a constant velocity of 42 km/h, they pass each other at x=76.2 m. What are (a) the initial velocity and (b) the constant accleration of the green car?

Answer 1

Here is the same problem with different values. The problem is solved using a similar method to yours, hopefully it helps you.

Problem:

A red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 220 m. If the red car has a constant velocity of +20 km/h, the cars pass each other at x = 44.8 m, and if it has a constant velocity of +40 km/h, they pass each other at x = 77.7 m.