Mp hw09a

# Mp hw09a - MasteringPhysics Assignment Print View Page 1 of...

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IUPhysicsP201F2009 Assignment09a Due at 11:00pm on Tuesday, October 28, 2008 Assignment Display Mode: View Printable Answers View Grading Details Torques on a Seesaw: A Tutorial Description: Balancing seesaw: intuition, how it relates to torque, and finally balancing using horizontal force. (version for algebra-based courses) Learning Goal: To make the connection between intuitive understanding of a seesaw and the standard formalism for torque. This problem deals with the concept of torque, the "twist" that an off-center force applies to a body that tends to make it rotate. Use your intuition to try to answer the following question. If your intuition fails, work the rest of the problem and return here when you feel that you are more comfortable with torques. Part A Marcel is helping his two children, Jacques and Gilles, to balance on a seesaw so that they will be able to make it tilt back and forth without the heavier child, Jacques, simply sinking to the ground. Given that Jacques, whose weight is , is sitting at distance to the left of the pivot, at what distance should Marcel place Gilles, whose weight is , to the right of the pivot to balance the seesaw? Hint A.1 How to approach the problem Consider whether increases or decreases as each of the variables that it depends on, , , and , is made Page 1 of 13 MasteringPhysics: Assignment Print View 9/17/2008 http://session.masteringphysics.com/myct/assignmentPrint?assignmentID=1142221

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