Three Objects Are Connected by Weightless Flexible Strings as Shown

question 71

Short Answer

Three objects are connected by weightless flexible strings as shown in the figure. The pulley has no appreciable mass or friction, and the string connected to the block on the horizontal bench pulls on it parallel to the bench surface. The coefficients of friction between the bench and the block on it are and You observe that this system remains at rest.
(a) Find the mass of the hanging object A.
(b) What is the magnitude of the friction force on the block on the bench?

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Definitions:

Labor Employment

The act or process of employing labor forces and the state of being employed in work.

Marginal Revenue Product

The additional revenue generated from employing one more unit of a factor of production.

Wage Rate

The amount of money paid to an employee per unit of time or output, often expressed as an hourly rate.

Variable Input

An input whose quantity can be changed in the short run to adjust production levels, such as labor or raw materials.