This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Version PREVIEW Chapter 10 Angular Motion Johnson (84248) 1 This printout should have 45 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. Holt SF 07B 01 001 10.0 points A car tire rotates with an average angular speed of 31 rad/s. In what time interval will the tire rotate 3 . 1 times? Correct answer: 0 . 628319 s. Explanation: Let : avg = 31 rad / s and = 3 . 1 rev . avg = t t = avg = 3 . 1 rev 31 rad / s 2 rad 1 rev = . 628319 s . Holt SF 07B 02 002 10.0 points A girl ties a toy airplane to the end of a string and swings it around her head. The planes average angular speed is 2.5 rad/s. In what time interval will the plane move through an angular displacement of 3.4 rad? Correct answer: 1 . 36. Explanation: Let : avg = 2 . 5 rad / s and = 3 . 4 rad . avg = t t = avg = 3 . 4 2 . 5 = 1 . 36 . keywords: Holt SF 07B 03 003 10.0 points The average angular speed of a fly moving in a circle is 6.9 rad/s. How long does the fly take to move through 2.4 rad? Correct answer: 0 . 347826 s. Explanation: Let : avg = 6 . 9 rad / s and = 2 . 4 rad . avg = t t = avg = 2 . 4 rad 6 . 9 rad / s = . 347826 s . Holt SF 07B 04 004 (part 1 of 4) 10.0 points Consider the following values avg t a +2 . 5 rad 10 . 7 s +0 . 78 rev / s b . 27 s c 1 . 7 turns 1 . 7 s +2 . 2 rad / s +1 . 1 rad d What is the value of a ? Correct answer: 0 . 233645 rad / s. Explanation: Let : = +2 . 5 and t = 10 . 7 s . avg = t = +2 . 5 rad 10 . 7 s = . 233645 rad / s . 005 (part 2 of 4) 10.0 points What is the value of b ? Correct answer: 1 . 32324 rad. Explanation: Version PREVIEW Chapter 10 Angular Motion Johnson (84248) 2 Let : avg = +0 . 78 rev / s and t = 0 . 27 s . = avg t = (+0 . 78 rev / s) parenleftbigg 2 rad 1 rev parenrightbigg (0 . 27 s) = 1 . 32324 rad . 006 (part 3 of 4) 10.0 points What is the value of c ? Correct answer: 6 . 28319 rad / s. Explanation: Let : = 1 . 7 turns and t = 1 . 7 s . avg = t = 1 . 7 turns 1 . 7 s 2 rad 1 turn = 6 . 28319 rad / s . 007 (part 4 of 4) 10.0 points What is the value of d ? Correct answer: 0 . 5 s. Explanation: Let : avg = +2 . 2 rad / s , and = +1 . 1 rad . t = avg = +1 . 1 rad +2 . 2 rad / s = . 5 s . Holt SF 07C 01 008 10.0 points A figure skater begins spinning counterclock wise at an angular speed of 3.1 rad/s. Dur ing a 4.6 s interval, she slowly pulls her arms inward and finally spins at 7.8 rad/s. What is her average angular acceleration during this time interval?...
View
Full
Document
This note was uploaded on 05/06/2011 for the course PHYS 103N taught by Professor Chiu during the Spring '11 term at University of Texas at Austin.
 Spring '11
 Chiu
 Physics

Click to edit the document details