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Unformatted text preview: Problem solving Read the question (really read the question  read the question again) Draw a diagram (Free body diagram = all the forces on each object in the problem separately) Define a coordinate system Which direction is positive for x and for y? Write down the relevant equations (We need to understand the physics which describes the situation ) Rearrange equations to find the unknown This may take a couple of steps but we mustn't panic lecture 1 in a nutshell (check out chapter 33.3 ) Must know how to Recognize a vector Multiply vector by scalar Add vectors using tail to tip and parallelogram rules Be able to find the component vectors, or use component vectors to find the magnitude and direction of a vector. The lecture in a nutshell 2 Must know Total displacement total time = v t = r Total distance covered total time s = Total change in velocity total time = a t = v s = v Lecture 4 in a nutshell ( 29 1 x x = x ( 29 2 x x t = y ( 29 1 y y gt = ( 29 2 1 2 2 y y t gt = ( 29 2 2 2 3 y y g y = ( 29 4 2 y y y t + = Motion in the vertical and horizontal directions are independent. However t is common Equations in both dimensions are necessary to solve most problems. Lecture 6/7 in a nutshell The subscript rule PG = v PT v TG + v Heading This is the direction you point the vehicle , BW v...
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 Fall '07
 Dr.Jackman
 Physics, Force

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