Block a of Mass 8

question 11

Multiple Choice

Block A of mass 8.0 kg and block X are attached to a rope that passes over a pulley. A 50-N force P is applied horizontally to block A, keeping it in contact with a rough vertical face. The coefficients of static and kinetic friction between the wall and block A are μ_s = 0.40 and μ_k = 0.30. The pulley is light and frictionless. In the figure, the mass of block X is adjusted until block A descends at constant velocity of 4.75 cm/s when it is set into motion. What is the mass of block X?

• A) 6.5 kg
• B) 7.2 kg
• C) 8.0 kg
• D) 8.8 kg
• E) 9.5 kg

---

Definitions:

Parking Lot

A designated area where vehicles can be parked, typically paved and marked for individual spots.

Ping

A network utility command used to test the reachability of a host on an Internet Protocol (IP) network.

Piece of Metal

A fragment or section of metal, which can vary in size, shape, and type, depending on its intended use or origin.

Damaged Tooth

A damaged tooth refers to a tooth that has been broken, chipped, cracked, or otherwise harmed, often requiring dental treatment to repair or protect it.