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Unformatted text preview: P H Y 1 1 : H o w t h e “ w o r l d ” w o r k s I Fun with cornstarch?! See http://www.youtube.com/watch?v=f2XQ97XHjVw T h e P r o f e s s o r a n d O t t o : T w o- d i m e n s i o n a l m o t i o n Let’s start with a pep talk about solving physics problems. G. R. A. S. P. • Given: Write down all the givens • Required: Write down the required variables • Analysis: Analyze the problem in terms of the appropriate concepts/equations/diagrams • Solution: Solve the problem with the insight from your analysis • Paraphase: Understood what you have just done and can paraphase your answer G . R . A . S . P : S o l u t i o n Once you have the equations written down and figured out what variable you need to solve for, then we can use algebra to isolate that variable. For example, given an equation y = xz , where z and y are given and x is “required”, we isolate x by multiplying both sides of the equation by 1 /z to arrive at x = y/z . • What you do to one side of the equation, you must do the other! G . R . A . S . P : S o l u t i o n What about adding vectors to solve a problem? Consider the vector, r , below: x y Origin r G . R . A . S . P : S o l u t i o n What about adding vectors to solve a problem? Consider the vector, r , below: x y Origin r r is the sum of two simpler vectors, one in the + x direction r x and the other in the + y direction r y ....
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This note was uploaded on 05/18/2008 for the course PHY 101 taught by Professor Schwarz during the Fall '08 term at Syracuse.
- Fall '08