What friction torque is needed to reduce its angular speed

Reference no: EM1351732

Q. An 88 kg spacewalking astronaut pushes off a 640 kg satellite, exerting a 640N force for the 0.60 s it takes him to straighten his arms.

How far apart are the astronaut and the satellite after 1.30 minute?

Q. Exercise 10.8 A uniform, 9.0 kg, spherical shell 48.0 cm in diameter has four small 2.50-kg masses attached to its outer surface and equally spaced around it. This combination is spinning about an axis running through the center of the sphere and two of the small masses. What friction torque is needed to reduce its angular speed from 78.0 rpm to 48.0 rpm in 33.0 s?

Reference no: EM1351732

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