Recent content by vgptgupta

So what does the line "the subscript i on the del operator indicates that the derivatives are with respect to the components of ri" mean.

Thanks for the "ij" explanation but what about my other question i.e., why F=-∇iVij and why ∇i, why not only ∇.

I'm facing some problem in understanding few basic concepts of classical physics. http://www.fotoshack.us/fotos/67357p0020-sel.jpg I cannot understand what does "ij" indicate in "Vij" and how does F=-∇iVij. Why ∇i, why not only ∇. Please help anybody. I'm practically getting frustrated...