posted by arcos15 .
Two 12.0 kg boxes are connected by a massless string that passes over a massless frictionless pulley as shown above. The boxes remain at rest, with the one on the right hanging vertically and the one on the left d = 2.9 m from the bottom of an inclined plane that makes an angle of θ = 33° with the horizontal.
(a) What is the tension T in the string?
(b) Determine the magnitude of the frictional force between the box and the plane.
You then polish the plane surface, let the blocks go and they accelerate at 3.0 m/s2
(c) The rope tension is now equal to