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9. A large toy yo–yo consisting of two uniform disks, each with radius r = 0.1...

9. A large toy yo–yo consisting of two uniform disks, each with radius r = 0.1 m and mass 0.5 kg, connected by a cylindrical piece with radius 1.0 cm and mass 0.1 kg is rolling down an incline plane (making an angle of 20◦ with respect to the horizontal). The yo–yo starts out from rest. What is the angular speed of the yo–yo after it travels through a height of 2.0 m?

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