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 μs = 0.40 and μk = 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? 
Definitions:
Par Value Common Stock
The nominal or face value assigned to common shares in the charter of a corporation, which has little relation to the market value.
Paid-in Capital
The amount of money shareholders have invested in a company in exchange for equity, excluding any earnings retained by the company.
Market Value
The ongoing rate at which a commodity or service is offered for buying or selling in the market.
Dividend Yield
Dividend yield is a financial ratio that shows how much a company pays out in dividends each year relative to its stock price.
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