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Common Mistakes

Common Mistakes. Understanding of basic concepts Displacement is a comparison between final and initial positions Go back to the definitions!! Average speed does not mean to use a mathematical average of different speeds. Average velocity is displacement divided by time. Common Mistakes.

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Common Mistakes

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  1. Common Mistakes • Understanding of basic concepts • Displacement is a comparison between final and initial positions Go back to the definitions!! • Average speed does not mean to use a mathematical average of different speeds. • Average velocity is displacement divided by time

  2. Common Mistakes • Interpreting graphs • position vs time graph • What is slope on this graph? • How is distance determined? • How is displacement determined? • Velocity vs time graph • What is slope on this graph? • How is distance determined? • How is displacement determined?

  3. Common Mistakes • Equation for average velocity this is NOT the same as total displacement/time ∆ is delta…or “change in” ∆x is xf– xi or final position minus initial position

  4. Common Mistakes • Errors in manipulating simple equations average speed = then t and d= WRITE DOWN THE EQUATIONS! Solve for the correct variable…then put the numbers in the equation

  5. Common Mistakes • Not writing the equation down at all!! • The instructions stated that you must: • Write the proper equation (1 point) • Put the proper knowns in the equation (1 point) • Solve the equation (properly) to get the correct answer • Write the correct unit and direction (if a vector)

  6. What to do now? • Find some time to come and talk to me. • Make an appointment before or after school, 2nd, 3rd or 6th • Review your test with the answer key (in binder in front of room) • Ask questions in class!! • Anyone who scores below 20 on consecutive tests will meet with me to discuss how to improve in class. • Any questions?

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