Block a of Mass 8

question 27

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

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Definitions:

Cognitive Development

The developmental progression and transformation of cognitive skills, including thought, logic, and comprehension, throughout one's life.

Piaget's Theory

A theory of cognitive development that outlines how children's intelligence changes as they grow, characterized by stages including sensorimotor, preoperational, concrete operational, and formal operational.

Thought Processes

The mental operations involved in the perception, reasoning, judgment, and memory.

Low Birth Weight

A term used to describe babies born weighing less than 2,500 grams (5 pounds, 8 ounces).