SDMC Find the Average Starting Energy of The Ball Analysis of Falling Ball

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Height Before Drop (m)

First Bounce Height (m)

Second Bounce Height (m)
















For questions 1-3, use the heights recorded in Table 2, and treat the mass of the bouncy ball as 3.5 grams.

  1. Find the average starting energy of the ball, the average energy at the first bounce max height, and the average energy at the second bounce max height. Is there a drop in energy between bounces? Does it seem to be consistent?
  2. How much of
    a difference in energy is there between the energy values of the first
    bounce of three separate trials, compared to the average energy first
    bounce energy?
  3. What is the
    average kinetic energy of the ball just before the first bounce? What is
    the average velocity just before that first bounce?
  4. Using kinematics
    through freefall, how does your answer in question 3 compare to the
    theoretical value? Give your answer as a percent error.

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New York University

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