Posted by **arcos15** on Friday, October 19, 2012 at 12:46pm.

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?

______ N

(b) Determine the magnitude of the frictional force between the box and the plane.

______N

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

________N

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