Problem_of_the_Week_&acirc;€“_12

# Problem_of_the_Week_&acirc;€“_12 - there The...

This preview shows page 1. Sign up to view the full content.

Problem of the Week – 12 A rod of length L and negligible mass is attached to a disk of mass M and radius R. 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 string s has come off the disk, and the balls have collided with the ends of the rod and stuck
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 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? b) At this instant, the angular speed of the disk is ω . How much thermal energy has been produced? c) In the next short amount of time Δ t, by how much will the angular speed change ( Δω )? d) Bonus: Instead of assuming that you know ω in part (b), solve for it!...
View Full Document

## This note was uploaded on 12/07/2011 for the course PHYS 172 taught by Professor ? during the Fall '08 term at Purdue.

Ask a homework question - tutors are online