A 20 kg uniform door has a width of 1.2 m and a height of 2.5 m. The door is mounted on a post by a pair of hinges, marked 1 and 2, at the top and bottom of the door. An external force of 60 N, at an angle of 30° above the horizontal, is applied to the doorknob, as shown. The doorknob is 1.0 m above the bottom of the door.
-In the figure,the x-component of the force,exerted on the door at the bottom by hinge 2,is closest to:
Definitions:
Deltoid
A voluminous, triangle-formed muscle encasing the shoulder joint, essential for arm lifting and allowing for the shoulder's motion span.
Pectoralis Major
The pectoralis major is a large chest muscle that contributes to arm flexion, rotation, and the movement of the shoulder.
Pelvic Diaphragm
A muscular sheet at the base of the pelvis, consisting mainly of the levator ani and the coccygeus muscles, which supports pelvic organs.
Levator Ani
A group of muscles in the pelvis that support the pelvic organs.
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