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A firm wants to determine the amount of frictional torque intheir current line of grindstones, so they can redesign them to bemore energy efficient. To do this, they ask you to test thebest-selling model, which is basically a diskshaped grindstone ofmass 1.2 kg and radius 9.10 cm which operates at 750 rev/min. When the power is shut off, you timethe grindstone and find it takes 27.0s for it to stop rotating.
(a) What is the angular acceleration of the grindstone?(Assume constant angular acceleration.)
(b) What is the frictional torque exerted on the grind stone?
A block with mass 2.0 kg is on a horizontal frictionless surface and is placed against a compressed spring that has force constant 128 N/m. what is the speed of the block after it has left the spring
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question the plates of a spherical capacitor have radii 43.4 mm and 46.9 mm. what must be the plate area in square
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typical blood velocities in the coronary arteries range from 10 to 30 cms. an electromagnetic flowmeter applies a
question a playground is on the flat roof of a city school 6.00 m above the street below. the vertical wall of the
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