Slider problem: Values are not "even".
Click on the manual animator buttton and then move the animator until the cars meet. Time will be 4 hours.
Look at their positions in km. They should both be 140km. They are not and you cannot get them to be.
This is a slider problem.

Slider problem fixed: Values are "even".
Click here to open the Fixed Activity.
In that activity, click on the manual animator buttton and then move the animator until the cars meet.
Again, time will be 4 hours. Look at their positions in km. They are now both at 140km.
The slider problem is fixed.

 The only difference between the two files is in the increment of time slider t0.
In the first activity, the increment is the standard 0.01. Even using 0.001 did not help.
The trouble is that the time is 6 hours. The numbers 0.01 and 6 have relatively prime issues.
The second activity has an increment of 0.033. Notice that this is a bigger increment step.
But, the numbers 0.033 and 6 do not have relatively prime issues and all is well.
If you have other slider troubles  write me and we will try to work them out!
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