Question: The 2 0 lb block B rests on the surface of a table for which the coefficient of kinetic friction is k = 0 .

The 20 lb block B rests on the surface of a table for which the coefficient of kinetic friction is k=0.1.
Find the tension in the cord and the velocity of the 10 lb block A after it has moved downward 2 ft from rest. Neglect the mass of the pulleys and cords.
You must draw coordinates and appropriate FBKDs.
The other solutions of this problem have confused me because they have treated the given values of the blocks as a mass, despite them being in lbs, which is a unit of force. Please explain why.
The 2 0 lb block B rests on the surface of a

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