torque/force problem - two door hinges - help anyone? A large door of height - 2.1 m - along y axis that extends vertically upward and width - 0.95 m - along x axis that extends outward from the hinged edge of the door. A hinge at 0.30 m from the top and a hinge at 0.30 m from the bottom, each support half the door's mass which is 28 kg. (a) In unit-vector notation, what is the force on the door at the top hinge? ___ N i +____ N j (b) In unit-vector notation, what is the force on the door at the bottom hinge? ___ N i +____ N j ------------------------------ I don't understand where the horizontal force - vector in i direction - is coming from if there's no horizontal movement and only gravity is acting along the y-axis or j hat so my answers for the j hat vectors are simply 9.8x14= 137.2N which is the correct answer... but i don't understand parts A and C??? help anyone???