1. Click [b]Play[/b] to view the simulation. The top one is moving with constant velocity. The lower one is de-accelerated!
2. Press [b]initialize[/b], then press [b]play[/b] again after fter both particles stopped (when one of them reach one end.)

at t=4.8 second both particles have the same x coordinate again.
Question for you to think about?
Both of them start at the same x coordinate with different initial velocity. Which one has larger initial speed? at what time both particles have the same speed?
Can you find out the answer? How?

Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop.