10/23/13, Wednesday

Post date: Oct 23, 2013 1:2:31 PM

Bell Ringer

• • Explain how today's demonstration (with the rings and the drill) is consistent with the equation F_c = mv_t² / r

Activities

• • Circular motion labs - data and analysis

    • Data

      • Be sure you're using standard units for all measurements (kg, m, sec, N)

      • Ultimately, need a table and a graph comparing the measured value of F_c to the calculated value of F_c

    • Analysis

      • Draw a line on your graph (in a different color from the rest of your data) that shows the relationship we would expect given the equation for centripetal force

      • Compare your observed data to the ideal line you drew in. Discuss whether your data is consistently above the line, consistently below the line, or equally above and below the line, and what this means.

      • Discuss WHY you think you found the pattern you did for the previous questions.

      • If there was something we neglected that we shouldn't have, do we now have sufficient data to estimate a value for that missing piece? If so, do so.

      • Complete the analysis as usual (what you learned, sources and amounts of uncertainty in data, suggestions for future experiments)

  • Begin Gravitation notes

Assignments

• • Pages 263-267: 7, 9, 10, 11, 18, 27, 28, 37, 45, 48 - due Friday, 10/25

  • Circular motion lab - due Monday, 10/28

Announcements

• • Chapter 7 test Monday, 10/28