I can not understand the friction example very well.
1.What is the role of the following command?
compute new mobile temp/partial 0 1 0
Why to exclude the y velocity component? Why should the following
modify command used this temp?
2.Why is the two half-spheres so small in the animation? Their radii
are all 8 which equal the distance between the region hi-slab and
Thanks for any advice.