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Unformatted text preview: Lab 3 Falling Bodies Lab Report (100 pts) Name: _ PHYS 1114 ' ‘\ Section: Day and Time: Oi/Z‘g a 50 Station Check: ’M’ Table 1. Steel Ball Displacement vs. Time Data (30 pts) m
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Time 4 _ / (sec)  7 Time 5 ‘ 3. Average Time m i A ,‘
(sec) J ’* ' ' '
Time Squared ﬂ
(secz) ‘V 29 Lab 3: Falling Bodies Table 2. Aluminum Ball Displacement vs. Time Data (30 pts) Average Time ,, (a 1..., (sec) 1  ' '~ a 3m; Time quuared ; p 1/?
(sec ) ‘ ‘~ ,, O a: a 3 Questions, Exercises, and Calculations for Part II 1. Enter the data into the provided Excel spreadsheet and have your TA check your results.
Once it is approved, print the spreadsheets and attach to the lab report. 2. IF the plotted displacement vs. time—squared data points readily show that a straight line
can be drawn through them, even if the points are somewhat scattered about a line instead
of all lying on a line, \/ Use a proper slope technique to acquire the slope of [the line of best ﬁt. Do not guess,
and do not use data. Refer to the section on graphical representation of data at
the front of the lab manual if you need help. (9 pts, 9 pts) 3. According to kinematics, the predicted expression for the behavior of the balls as the fall . . 1 . .
through the an IS y = E gtz. What are the spec1ﬁc express1ons for your data of the two balls. [HWTz Use the basic equation for a line] (4 pts) t i 2 J Aluminum: Steel: 30 Lab 3 Falling Bodies 4. According to the predicted relationship, how are the slopes of your graphs related to the
motion of the balls? (2 pts) "Here if 5. Based on your expression and the predicted relationship, what is the magnitude of the
acceleration of each ball? (6 pts) Steel: ( Aluminum: / 6. Compare the values of the acceleration to the predicted acceleration (g=9.8m/sz). Use
percent error. (Show work for one) (5 pts) Steel: 0 75:3 ~~ 7’? ‘
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Aluminum:
‘ ‘ A, a.” A » at x f /7 1 ’ Airwww n} ‘6’” ’ 31 Lab 3: Falling Bodies 7. According to theory, how should the accelerations of the two balls compare with each
other? (Hint: Does the mass difference matter?) Explain. (2 pts) twv‘ w .
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a in g H ; . . l .. , r r ; 3 / 8. Compare the accelerations of the two balls. (Do a percent difference). Do they fall with
nearly the same constant acceleration? (3 pts) 32 00N.0 A~<w0 395:3 9::
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 Spring '08
 Nandi

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