Question

Block A (Mass = 2.319 kg) and Block B (Mass = 1.870 kg) are attached by a massless string as shown in the diagram. Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes over (you guessed it) a frictionless, massless pulley. Block B hangs down vertically as shown. When the two blocks are released, Block B accelerates downward at a rate of 2.250 m/s2.
The Tension in the string is 14.1 N.

b.)What is the magnitude of the force of friction acting on Block A?
c.) What is the coefficient of friction between the tabletop and Block A?

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