/**
* 1/19/05 (A. Gonzalez) Chapter No., Book No. and Title Added
* 6/20/05 Modified: (J. Lucca) Removed frames from quizzes.
* 7/7/05 Modified: (J. Lucca)
* Can turn off HISTOGRAM and randomize_questions on any ch##.htm page
* by setting them here to false. Both default to true in quiz.js.
* 12/1/05 Modified: (J. Lucca)
* Can turn off histogram SECTIONS and/or TYPES on any ch##.htm page
* by setting them here to false. Both default to true in quiz.js.
*/
//////////////////////////////////////////////////////////////////////////////
// HISTOGRAM AND RANDOMIZE OPTIONAL SETTINGS
// Can turn off per quiz or leave defaults (as set in quiz.js) as true.
// randomize_questions=true; HISTOGRAM=true; SECTIONS=true; TYPES=true;
//////////////////////////////////////////////////////////////////////////////
//HISTOGRAM = false
//SECTIONS = false
TYPES = false
/**
* Required settings for all Gradebooks:
* chapter_no, book_no, book_title
*
* Required when HISTOGRAM = true:
* At least a section_title[] with its matching q#section for each question
* or a type_title[] with its matching q#type for each question.
* Without at least one of these you won't get any histograms.
*/
// ////////////////////////////////////////////////////////////////////////////
// BEGIN PASTE - Paste any existing quiz javascript questions
// between this comment and one just like it near bottom of page
// ////////////////////////////////////////////////////////////////////////////
// General settings
var chapter_no = "12"
var book_no = 97422
var book_title = "Physics for Engineers and Scientists 3rd Edition"
quiz_name = "Physics for Engineers and Scientists 3rd Edition, Chapter 12 Quiz"
var confirm="/college/physics/om/_content/_index/confirm.htm"
number_answers = new Array(5, 4, 5, 5, 5);
var number_questions = number_answers.length;
// Sections
section_title = new Array() //Leave at least this line! Can delete ones under.
section_title[1] = "12.1 Motion of a Rigid Body"
section_title[2] = "12.2 Rotation about a Fixed Axis"
section_title[3] = "12.3 Motion with Constant Angular Acceleration"
section_title[4] = "12.4 Motion with Time-Dependent Angular Acceleration"
section_title[5] = "12.5 Kinetic Energy of Rotation; Moment of Inertia"
// Types
type_title = new Array(); //Leave at least this line! Can delete ones under.
q1 = "
Which of the rotating bodies above does not rotate about an axis through its center of mass?";
q1a = "Fan";
q1b = "Roulette wheel";
q1c = "Compact disc";
q1d = "Swinging door";
q1e = "Merry-go-round";
q1section = "1";
q1answer = "d";
q1type = "";
q1review = "The axis of rotation is through the hinges, along the edge of the door.";
q2 = "
Consider the motion of the hammer shown in the figure above. Taking into account only the rotational motion, which end of the hammer has the larger speed v around the axis? The larger centripetal acceleration acentripetal?";
q2a = "Head end; head end";
q2b = "Head end; handle end";
q2c = "Handle end; head end";
q2d = "Handle end; handle end";
q2section = "2";
q2answer = "d";
q2type = "";
q2review = "Since the rotation is about an axis through the center of mass (near the hammer head), the end of the handle is furthest from the axis. Thus both the speed v = ωR and the centripetal acceleration acentripetal = ω2R are largest at the end of the handle, since R is largest there (and ω is a constant for all points on a rigid body).";
q3 = "A grinding wheel accelerates uniformly for 3 seconds after being turned on. In the first second of motion, the wheel rotates 5 times. In the first two seconds of motion, the total number of revolutions is:";
q3a = "6";
q3b = "10";
q3c = "15";
q3d = "20";
q3e = "25";
q3section = "3";
q3answer = "d";
q3type = "";
q3review = "For constant acceleration and starting from rest, the angular position is Φ = 1/2at2. Since this is proportional to t2, the angular position will be four times greater in twice the time. Thus the total number of revolutions in the first two seconds is 4 × 5 = 20.";
q4 = "A car on a circular roadway accelerates from rest beginning at t = 0, so that its angular acceleration increases in proportion to the time t. With what power of time does its centripetal acceleration increase?";
q4a = "t";
q4b = "t 2";
q4c = "t 3";
q4d = "t 4";
q4e = "t 5";
q4section = "";
q4answer = "d";
q4type = "";
q4review = "If the angular acceleration a increases in proportion to the time t, then the angular velocity ω = ∫ a dt increases in proportion to t2. The centripetal acceleration is given by acentripetal = v2/R = ω2R, and so increases in proportion to the fourth power of the time.";
q5 = "
According to the table above, the moment of inertia of a hoop about its symmetry axis is ICM = MR2.What is the moment of inertia if you twirl a large hoop around your finger, so that in essence it rotates about a point on the hoop, about an axis parallel to the symmetry axis?";
q5a = "5MR2";
q5b = "2MR2";
q5c = "3/2 MR2";
q5d = "MR2";
q5e = "1/2 MR2";
q5section = "5";
q5answer = "b";
q5type = "";
q5review = "Since the axis is shifted by a distance d = R, the parallel-axis theorem gives I = ICM + Md2 = MR2 + MR2 = 2MR2 for rotation about a point on the hoop.";