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Unformatted text preview: PROBLEM 03.17 SOLVED The best leaper in the animal kingdom is the puma, which can jump to a height of 12 ft when leaving the ground at an angle of 45. With what speed, in SI units, must the animal leave the ground to reach that height? PROBLEM SOLVING STRATEGY 1. Read Problem 2. Draw Diagram 3. Label Physical Quantities 4. Identify Principle(s); list data 5. Choose equation(s) 6. Solve equation(s) 7. Substitute Known Values 8. Check Answer READ PROBLEM 1. Read Problem 2. Draw Diagram 3. Label Physical Quantities 4. Identify Principle(s); list data 5. Choose equation(s) 6. Solve equation(s) 7. Substitute Known Values 8. Check Answer Question (answer questions in red on your own paper before moving on): You read the problem, what is it youre looking for again? Are you 100% sure you understand the deFnition of that word? If not, look back in your notes, the exact deFnition is important. DRAW DIAGRAM 1. Read Problem 2. Draw Diagram 3. Label Physical Quantities 4. Identify Principle(s); list data 5. Choose equation(s) 6. Solve equation(s) 7. Substitute Known Values 8. Check Answer Draw your diagram being careful to not waste time adding unnecessary embellishments. Do not move on until you have a diagram to compare with mine. v i a y = g a x = 0 a Draw the problem and start labeling the different parts of the motion. v ix v iy v i v x a y = g a x = 0 a Break 2D motion into two 1D problems by decomposing each vector into its horizontal and vertical components. Notice I stopped half way through the jump? The displacement at half way is the maximum height of the puma. y x v ix v iy v x Note: Once youve broken a vector into its two components you should only be thinking about the components as illustrated above. In reality, your picture will still contain the original vectors (as in the following slides), but you should ignore them and remind yourself that youre dealing with two 1D problems once you decompose the vectors....
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 Fall '08
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