A System of Blocks and a Frictionless Pulley Is Shown

question 76

Multiple Choice

A system of blocks and a frictionless pulley is shown in the figure. Block A has a mass of 2.0 kg and is on a rough horizontal surface for which μ_s = 0.40 between the surface and block A. The rope pulls horizontally on block A. Block C has a mass of 1.0 kg. An external force P = 23.0 N, applied vertically to block A, maintains the system at rest as shown in the figure. What is the friction force on block A?

• A) 6.3 N
• B) 6.9 N
• C) 7.5 N
• D) 5.7 N
• E) 5.1 N

---

Definitions:

Pretend

To act as if something is true when it is not, often to entertain or practice.

Retrieving

The process of getting information out of memory storage and back into conscious awareness.

Videotape

A magnetic tape used for recording and playing back visual and auditory information.

Soundtrack

The audio component of a movie, video game, or television program, including music, dialogue, and sound effects.