MP #14

# MP #14 - Print View Class PH1110A2007 Assignment 14 Due at...

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1 of 6 [ Print View ] Class PH1110A2007 Assignment 14 Due at 5:00pm on Wednesday, October 3, 2007 View Grading Details 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

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2 of 6 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? ANSWER:
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MP #14 - Print View Class PH1110A2007 Assignment 14 Due at...

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