Solution 10 - reyes(mr29667 – Homework 10 – chelikowsky –(59005 1 This print-out should have 7 questions Multiple-choice questions may

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

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: reyes (mr29667) – Homework 10 – chelikowsky – (59005) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points At t = 0, a wheel rotating about a fixed axis at a constant angular deceleration of 0 . 65 rad / s 2 has an angular velocity of 1 . 7 rad / s and an angular position of 6 . 3 rad. What is the angular position of the wheel after 5 s? Correct answer: 6 . 675 rad. Explanation: Let : α = − . 65 rad / s 2 , ω = 1 . 7 rad / s , θ = 6 . 3 rad , and t = 5 s . The angular position is θ f = θ + ω t + 1 2 αt 2 = 6 . 3 rad + (1 . 7 rad / s) (5 s) + 1 2 ( − . 65 rad / s 2 ) (5 s) 2 = 6 . 675 rad . 002 (part 1 of 3) 10.0 points As a result of friction, the angular speed of a wheel c hanges with time according to d θ d t = ω e- σ t , where ω and σ are constants. The angular speed changes from an initial angular speed of 5 . 31 rad / s to 4 . 21 rad / s in 3 . 92 s . Determine the magnitude of the angular acceleration after 2 . 45 s. Correct answer: 0 . 271976 rad / s 2 ....
View Full Document

This note was uploaded on 07/24/2010 for the course PHY 59005 taught by Professor Chelikowsky during the Fall '09 term at University of Texas at Austin.

Page1 / 3

Solution 10 - reyes(mr29667 – Homework 10 – chelikowsky –(59005 1 This print-out should have 7 questions Multiple-choice questions may

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online