Block a of Mass 5

question 34

Multiple Choice

Block A of mass 5.0 kg and block X are attached to a rope which passes over a pulley, as shown in the figure. An 80-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. The mass of block X is adjusted until block A moves upward with an acceleration of 1.6 m/s². What is the mass of block X?

• A) 9.9 kg
• B) 9.3 kg
• C) 8.7 kg
• D) 8.1 kg
• E) 7.5 kg

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Definitions:

Self-Love

The regard for one's own well-being and happiness, often considered as a positive trait.

Self-Serving Bias

A common cognitive bias that leads individuals to attribute their successes to internal factors while blaming external factors for their failures.

Bonus

An additional amount of payment given beyond what is due, usually as a reward for performance or as an incentive.

Taxed

Imposed with a financial charge or other levy by a governmental organization in order to fund various public expenditures.