A 20 Kg Uniform Door Has a Width of 1

question 14

Multiple Choice

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 top by hinge 1,is closest to:

• A)zero
• B)+55 N
• C)+80 N
• D)-55 N
• E)-80 N

---

Definitions:

Concrete Advice

Specific and practical recommendations or guidance.

Motivation

The driving force behind an individual's actions, desires, and needs.

Ambivalent Feelings

Mixed feelings or emotions towards a person, object, or idea, characterized by uncertainty or an inability to make a clear decision or stance.

Overcoming

The act of successfully dealing with or gaining control of a problem, obstacle, or difficult situation.