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A machine part has the shape of a solid uniform sphere of mass 225g and diameter 3.50cm . It is spinning about a frictionless axle through its center, but at one point on its equator it is scraping against metal, resulting in a friction force of 0.0200 at that point.
A) Find its angular acceleration. Let the direction the sphere is spinning be the positive sense of rotation.
B) How long will it take to decrease its rotational speed by 21.0 Rad/s ? Thank you!
Two small charges with a mass of 1.0 g each are connected by 2.0-cm-long insulating rod of negligible mass. What is the dipole moment of the rod?
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A 11.3 kg object hangs in equilibrium at the end of a rope (taken as mass less), while a wind pushes the object with a 64.9 N horizontal force, Find the tension in the rope and the rope's angle from the vertical
A railroad hopper car has a mass of 50000 kg when empty and contains 50000 kg of coal. How fast does the car travel after all the coal is dumped
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