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