This is a link to a picture of my problem: http://img57.imageshack.us/img57/9382/cart5rh.jpg [Broken] It asks what tension on the rope would give the cart a maximum acceleration. The surface the cart is on is frictionless, while the cart itself is not (the surface the box is on). To solve this, I figured that pulling the rope with a force of usN would give the maximum acceleration of the cart. However, this seems too easy; I think I may have not completely answered the question. |T| = usN = usmg Is my reasoning correct? Thanks.