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:

Temporal

Related to time or also pertaining to the temples of the head near the temporal bones of the skull.

Sphenoid

A butterfly-shaped bone at the base of the skull, behind the eyes, touching on various important structures and enclosing the pituitary gland.

Maxilla

the upper jawbone in vertebrates, which is key to the formation of the palate, nose, and eye orbits.

Lumbar Curvature

The inward curve of the lumbar spine (lower back), which is a natural part of the spine's shape.