A rope is fixed at both ends on two trees and a bag is hung in the middle of the rope (causing the rope to sag vertically).
(a) The tension in the rope depends on (1) only the tree separation, (2) only the sag, (3) both the tree separation and sag, (4) neither the tree separation nor the sag.
(b) If the tree separation is 10 m, the mass of the bag is 5.0 kg, and the sag is 0.20 m, what is the tension in the line?