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vtech
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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
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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?
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?
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