lecture12 - Torque Torque Torque in 2 and 3 dimensions Text...

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Torque Torque Text Sections : 10.6 Torque in 2 and 3 dimensions
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An unbalanced force applied to an object causes it to move (accelerate). F a Even with no net force, the object is not necessarily in equilibrium. A net torque will cause it to rotate. F -F Torque is what causes rotation
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Quiz A weight W is placed at one end of a light plank. What weight should be placed at the other end so that the plank will balance on a pivot placed 1/3 of the way along the plank? a) 3W b) 2W c) W d) ½ W e) 1/3 W L/3 2L/3 W ?
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R F τ Each force produces a torque, (“tau”), which tends to rotate the plank about the pivot. Torque is proportional to the force and to the distance from the pivot: torque = (length of “lever”) x (force) (when the force is perpendicular to the “lever” – more complicated otherwise) rF =
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You cannot shut a door by pushing directly toward the hinges (F 1 ), or pulling directly away from the hinges (F 2 ). F
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This note was uploaded on 10/14/2011 for the course ENGINEER CHEM ENG 3 taught by Professor Ghosh during the Spring '11 term at McMaster University.

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lecture12 - Torque Torque Torque in 2 and 3 dimensions Text...

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