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MP49- Rotational Dynamics

# MP49- Rotational Dynamics - MasteringPhysics Assignment...

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4/28/08 3:03 PM MasteringPhysics: Assignment Print View Page 1 of 4 http://session.masteringphysics.com/myct/assignmentPrint?assignmentID=1114171 [ Print View ] PHYS 2211 ABCDE Spring 08 MP49: Rotational Dynamics Due at 11:59pm on Thursday, April 10, 2008 View Grading Details Finding Torque A force of magnitude , making an angle with the x axis, is applied to a particle located at point A, at Cartesian coordinates (0, 0) in the figure. The vector and the four reference points (i.e., A, B, C, and D) all lie in the xy plane. Rotation axes A - D lie parallel to the z axis and pass through each respective reference point. The torque of a force acting on a particle having a position vector with respect to a reference point (thus points from the reference point to the point at which the force acts) is equal to the cross product of and , . The magnitude of the torque is , where is the angle between and ; the direction of is perpendicular to both and . For this problem ; negative torque about a reference point corresponds to clockwise rotation. You must express in terms of , , and/or when entering your answers. Part A What is the torque due to force about the point A? Hint A.1 When force is applied at the pivot point Hint not displayed Express the torque about point A at Cartesian coordinates (0, 0). ANSWER: = 0 Part B What is the torque due to force about the point B? (B is the point at Cartesian coordinates (0, ), located a distance from the origin along the y axis.) Hint B.1 Finding with respect to a reference point Hint not displayed Express the torque about point B in terms of , , , , and/or other given coordinate data.

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MP49- Rotational Dynamics - MasteringPhysics Assignment...

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