A Uniform Disk of Radius 1

question 51

Multiple Choice

A uniform disk of radius 1.2 m and mass 0.60 kg is rotating at 25 rad/s around an axis that passes through its center and is perpendicular to the disk. A rod makes contact with the rotating disk with a force of 4.5 N at a point 0.75 m from the axis of rotation as shown. The disk is brought to a stop in 5.0 s. What is the coefficient of kinetic friction for the two materials in contact?

• A)0.22
• B)0.15
• C)0.64
• D)0.37
• E)0.55

---

Definitions:

Neurotic Anxiety

A psychological condition characterized by excessive worry or anxiety that is not based on any real external threat.

Anal Stage

In Freudian psychoanalysis, a developmental phase focusing on toilet training that can influence personality based on its success or failure.

Weapon

An object used to inflict harm or injury on others, typically designed for combat or defense purposes.

Repression

A defense mechanism where undesirable thoughts, memories, or desires are unconsciously pushed out of conscious awareness.