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Intro

Intro. Motion. Written Quiz More on proportionality Motion Diagrams in 1-D. 2315 2761 Mdcl1 Mdcl!. PRQ Rules. General Quiz rules:. Start when you are told to Stop writing as soon as you are told to Make sure that the TA can figure out which answer you circled

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Intro

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Presentation Transcript

  1. Intro Motion • Written Quiz • More on proportionality • Motion Diagrams in 1-D 2315 2761 Mdcl1 Mdcl!

  2. PRQ Rules General Quiz rules: • Start when you are told to • Stop writing as soon as you are told to • Make sure that the TA can figure out which answer you circled • Turn your paper over as soon as you are finished • If you are not finished, look ONLY at your own paper

  3. This Quiz: • You have 10 minutes • I will give you a 30 second warning • Please be sure to include your name AND student number!

  4. Quiz Answers

  5. Proportionality - another way If x  t2 x = C t2 Some constant You can use initial conditions to find the value of the constant ‘C’. Once you do, you can use the equation to predict future results.

  6. Worked Example QQ3 Prop A spring compressed by a force of 5N is compressed by 10cm. If a force of 20N is used, how far would the spring compress, given that for a simple spring: F  x, where F is the force and x the compression. • 5 cm • 10 cm • 20 cm • 30 cm • 40 cm

  7. Motion Diagrams • Motions Diagrams help give information about position as a function of time • The positions in a Motion Diagram are always shown at equal time intervals

  8. Like Movie Frames

  9. But Overlaid

  10. Like Movie Frames Constant Velocity Case:a= ? x t

  11. Demo

  12. Extra QQ Quick Quiz 5X - difficult Draw a motion diagram for a bouncing ball. Start the diagram when the ball is released, and end the diagram when it gets back to the top of its bounce. Get TAs to assist with the physics

  13. Do for next class: • Read: sections 1.3  pay special attention to • Other preparation: WebCT Vectors/Scalars forum Make a discussion thread that lets them list all possible vectors and scalars. Tell them that there will be a quiz question on identifying.

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