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The rotor of a toy gyroscope consists of an annular cylinder attached to a cylindrical shafts by spokes. The rotor is spun by pulling on a string wrapped around the shaft. a) What angular velocity is imparted to the rotor by pulling on the string for 2 seconds with a force of 100 newton? The mass of the rotor is 0.20 kg, the radii of the cylinder are 0.020 meter and 0.025 meter, and the radius of the shaft is 0.0020 meter. The angular momentum of the shaft and spokes is negligible. b) What is the rotational speed in revolution per minute? Explain why your answers are reasonable.


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