Hi!
I just saw your great web site. And I am having trouble with this question. I would appreciate it if you could help me.
Thanks

Question:
there is a relationship between load, hardness, coefficient of friction and wear. If the load in a given system is doubled, how are the other things impacted? provide a mathematical equations that support the statement.

Choices:
p=k(L/H)
coefficient of friction=frictional force/normal force