to a lightweig Laut string which keeps it in circular motion, as shown in the igure The disk slides on a horizontal table with negligible friction at speed v, = 70.0 cm/s, and the radius of its circular path is r, = 32.0 cm. The string passes a small hole in the table and is initially held in place. Th string is then slowly pulled downward a distance of 14.0 cm. How much work (in J) is done on the disk?
to a lightweig Laut string which keeps it in circular motion, as shown in the igure The disk slides on a horizontal table with negligible friction at speed v, = 70.0 cm/s, and the radius of its circular path is r, = 32.0 cm. The string passes a small hole in the table and is initially held in place. Th string is then slowly pulled downward a distance of 14.0 cm. How much work (in J) is done on the disk?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:A disk of mass m = 0.180 kg is attached to a lightweight, taut string which keeps it in circular motion, as shown in the figure below.
The disk slides on a horizontal table with negligible friction at speed v; = 70.0 cm/s, and the radius of its circular path is r; = 32.0 cm. The string passes a small hole in the table and is initially held in place. The
string is then slowly pulled downward a distance of 14.0 cm. How much work (in J) is done on the disk?
X J
How is work related to the change in kinetic energy? Can you use conservation of angular momentum to find the speed at the new radius? Can you relate the speed to the kinetic energy?
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