A rod of length L and negligible mass is attached to a uniform disk of mass M and radius R (see figure below).
A rod of length L and negligible mass is attached to a uniform disk of mass M and radius R (see figure below). A string is wrapped around the disk, and you pull on the string with a constant force F. Two small balls each of mass m slide along the rod with negligible friction. The apparatus starts from rest, and when the center of the disk has moved a distance d, a length of strings has come off the disk, and the balls have collided with the ends of the rod and stuck there. The apparatus slides on a nearly frictionless table. Here is a view from above.
(a) At this instant, what is the speed v of the center of the disk? (Use any variable or symbol stated above as necessary.)
(b) At this instant the angular speed of the disk is o. How much internal energy change has there been? (Use any variable or symbol stated above as necessary.)
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A rod of length L and negligible mass is attached to a uniform disk of mass M and radius R (see figure below).
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