A block (mass m1) lying on a frictionless inclined plane is connected to a mass m2 by

Question:

A block (mass m1) lying on a frictionless inclined plane is connected to a mass m2 by a mass less cord passing over a pulley, as shown in Fig. 4-57.
(a) Determine a formula for the acceleration of the system of the two block in terms of m1, m2, θ and g.
(b) What conditions apply to masses m1 and m2 for the acceleration to be in one direction (say, m1 down the plane), or in the opposite direction?

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