A disk of negligible mass and radius 30 cm is constrained to rotate on a frictionless axis about its center. The disk remains in a vertical plane with its axis horizontal. On the disk are mounted masses of 21 grams at a distance of 22.2 cm from the center, 10 grams data distance of 12.9 cm from the center and 41 grams at a distance of 11.4 cm from the center. A force is applied at the rim of the disk by a mass of 4.071 grams attached to by a light string around the rim.
•As the mass descends 53 cm, with the disk originally at rest, by how much does the potential energy of the system change?
•What therefore will be the angular velocity attained by the disk and the velocity attained by the descending mass?
2007-03-07
02:16:32
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2 answers
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asked by
Astalav
1
in
Physics