# HW 25 - Morby Grant Homework 25 Due Apr 3 2006 noon Inst...

This preview shows pages 1–2. Sign up to view the full content.

Morby, Grant – Homework 25 – Due: Apr 3 2006, noon – Inst: Drummond 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 3) 10 points A string is wrapped around the stem of a Yo- Yo which has a mass M and a moment of inertia I about its center axis. The radius of the stem is r 1 and the radius of the disk is r 2 . Denote the tension of the string T and the descending acceleration a . h r 2 r 1 M ω The correct torque equation is given by 1. T r 1 = 2 a I r 1 + r 2 . 2. T r 1 + r 2 2 = 2 a I r 2 . 3. T r 1 + r 2 2 = 2 a I r 2 - r 1 . 4. T r 1 = a I r 1 . 5. T r 1 + r 2 2 = 2 a I r 1 . 6. T r 2 - r 1 2 = 2 a I r 1 + r 2 . 7. T r 1 + r 2 2 = 2 a I r 1 + r 2 . 8. T r 2 = a I r 2 . 9. T r 2 = 2 a I r 1 + r 2 . 002 (part 2 of 3) 10 points The correct vertical force equation is given by 1. M g + T = M a . 2. M g - T = M a . 3. T - M g = M a . 003 (part 3 of 3) 10 points Release the Yo-Yo from rest. It reaches a center of mass speed v when it falls for a height Δ h . Using the same notation as in the previous questions, the correct work-energy equation is given by 1. 1 2 M v 2 = 1 2 Iv 2 . 2. 1 2 M v 2 = 1 2 I v r 1 2 . 3. M g Δ h = 1 2 I v r 1 2 . 4. M g Δ h = 1 2 M v 2 . 5. M g Δ h = 1 2 M v 2 + 1 2 I v r 2 2 . 6. M g Δ h = 1 2 M v 2 + 1 2 I v r 1 2 .

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern