# Physic Help. Important please!?

The ropes in the figure are each wrapped around a cylinder, and the two cylinders are fastened together. The smaller cylinder has a diameter of 10 cm and a mass of 3.5 kg ; the larger cylinder has a diameter of 20 cm and a mass of 15 kg .

What is the angular acceleration of the cylinders? Assume that the cylinders turn on a frictionless axle

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