i need any help that anyone can give me... i understand some things in physics, but i don't get the big picture, and I am really not sure of how to do things, and i am really confused about this one problem in particular... it states: a tractor uses a chain to drag a 675kg tree along the ground at a constant speed. The chain makes an anlge of 37degrees with the ground. What is the tension of the chain if the coefficient of kinetic friction between the ground and the tree is .45? my teacher emailed me the answer of t=2785 N, but i don't understand how he got the answer. Could someone explain this to me, and tell me what I am doing wrong please???