ch11-p018 - 18(a The derivation of the acceleration is...

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

View Full Document Right Arrow Icon
18. (a) The derivation of the acceleration is found in § 11-4; Eq. 11-13 gives a g IM R com com =− + 1 0 2 where the positive direction is upward. We use 2 com /2 R = where the radius is R = 0.32 m and M = 116 kg is the total mass (thus including the fact that there are two disks) and obtain () 2 22 0 0 1( / 2 ) 1// 2 gg a MR MR RR = + + which yields a = – g /51 upon plugging in R 0 = R /10 = 0.032 m. Thus, the magnitude of the center of mass acceleration is 0.19 m/s 2 . (b) As observed in §11-4, our result in part (a) applies to both the descending and the rising yoyo motions. (c) The external forces on the center of mass consist of the cord tension (upward) and the
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

Ask a homework question - tutors are online