15461135-masteringphys13 - Assignment View Class Chapter 13...

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Unformatted text preview: [ Assignment View ] Class PHYSICS110SPRING2007 Chapter 13 Assignment is due at 11:00am on Monday, May 21, 2007 Credit for problems submitted late will decrease to 0% over the course of 12 hour(s) after the deadline has passed. There is no penalty for wrong answers to free response questions. Multiple choice questions are penalized as described in the online help. The unopened hint bonus is 2% per part. You are allowed 4 attempts per answer. Angular Motion with Constant Acceleration Learning Goal: To understand the meaning of the variables that appear in the equations for rotational kinematics with constant angular acceleration. Rotational motion with a constant nonzero acceleration is not uncommon in the world around us. For instance, many machines have spinning parts. When the machine is turned on or off, the spinning parts tend to change the rate of their rotation with virtually constant angular acceleration. Many introductory problems in rotational kinematics involve motion of a particle with constant nonzero angular acceleration. The kinematic equations for such motion can be written as and . Here, the meaning of the symbols is as follows: • is the angular position of the particle. • is the initial angular position of the particle. • is the angular velocity of the particle. • is the initial angular velocity of the particle. • is the angular acceleration of the particle. In answering the following questions, assume that the angular acceleration is constant and nonzero: . Part A True or false: The quantity represented by is a function of time (i.e., is not constant). ANSWER: true false Part B True or false: The quantity represented by is a function of time (i.e., is not constant). ANSWER: true false Keep in mind that represents an initial value, not a variable. It refers to the angular position of an object at some initial moment. Part C True or false: The quantity represented by is a function of time (i.e., is not constant). ANSWER: true false Part D True or false: The quantity represented by is a function of time (i.e., is not constant). ANSWER: true false The angular velocity always varies with time when the angular acceleration is nonzero. Part E Which of the following equations is not an explicit function of time , that is, does not involve as a variable, and is therefore useful when you do not know or do not need the time?...
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This note was uploaded on 11/30/2009 for the course PHYS physics taught by Professor Physics during the Spring '09 term at Abraham Baldwin Agricultural College.

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15461135-masteringphys13 - Assignment View Class Chapter 13...

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