Free_Body_Diagram_recipe_v2

Free_Body_Diagram_recipe_v2 - Free Body Diagram Recipe...

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Free Body Diagram Recipe 1/Define preferred directions: 1 st the direction of motion and the direction perpendicular to it 2/Project the forces, on those two directions 3/ Apply Newton’s 2 nd law on each direction separately a) There is no motion in the direction perpendicular to the direction of motion Therefore, the acceleration in that direction is zero and so the projection of the net force in that direction is zero too b) The projection of the net force in the direction of motion is a m . 4/ Using the information in 3/ in a) we can in extract one of the forces if the second is known and make use of it in expression b) Following the comments of students I have added below the demonstration that the angle between the weight w=m g and the direction of N equal the slope See example below: A skier of mass m is sliding down a ski slope at a constant velocity. The slope makes an angle of above the horizontal direction. a) choose the axis of the free-body diagram
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This note was uploaded on 12/14/2011 for the course PHY 14434 taught by Professor Huang during the Spring '09 term at Wayne State University.

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Free_Body_Diagram_recipe_v2 - Free Body Diagram Recipe...

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