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College Physics (PHYC 2053 & 2 E3 Incorrect. You step onto a hot beach time does it take for the impulse, which travels a distance of 1.65 m, to reach your brain? your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at an average speed of 191 mys. How much ne Units m/s the tolerance is +/-4% LINK TO TEXT LINK TO TEXT Question Attempts: 1 of 3 used REP EAT QUESTION of MacBook Air
Lab Partners II, Pre-Lab Questions 1. A steel ball starts from rest, vri-O cms, & İs released from a holder to free-fall through a drop-height of Ay. Starting with the vertical displacement eqn, Δy-(vyì (M) + pa, (M i.e. Use the given value for vy, to simplify the y-displacement eqn &then solve what remains for the drogp- height. Ay, in terms of the drop-time, Δ. Ignore air drag. Assume the +y-axis is upward. dy 2 Let there be a new variable z, that is defined by: z-(A㎡ Apply this to your result from #1 to get a new eqn. Show the resulting eqn for the drop-height, Δ, in terms of z. 3. Consider the eqn from #2, what part of the symbolic eqn would be the slope? lope 4. It should be obvious to the casual observer that: a, ( g Substitute this into #3, & then solve symbolically for g in terms of the slope, (treat the word slope as if it is a variable name). 5. In the course of this lab, you squared the drop-time, z . Presumably, this was of some possible benefit to your data analysis. Explain what this action accomplished. (Read theory in Intro file & consider change in the shape of the plots.) 27 Jan 19 Physics1-Hartley
aD03PPeL-Hall Acceleration Name Data & Calculations: 1. Record the masses of the two balls, my &m. Record the drop-times of the two balls. 2. For each drop-height, calculate the average drop-time for the five trials for both balls. 3. For each drop-height, calculate the square of the average drop-time for the five trials for both balls, i.e., calculate z ** 4. For both the large & small balls, plot Δ y vs z, with a linear Trendline-put z on the horizontal axis. Attach all plots to end of lab report. (i.e. plot yellow rows vertically vs pink rows horizontally) 5. For both the large & small balls,use the slope from your graphs to compute a value for the acceleration due to gravity, g&gom (in Excel). ** 6-Cite the symbolic formula for %E in the space below left. In the table, compute the %E between each lab value, ge & gm & the known standard value for g. 7, Cite the symbolic formula for %Din the space below left. In the table, compute the %D between the masses, m, & m In the table, compute the %D between the two lab values, gag & gsm. ** %D = 27 Jan 19 Physics 1-Hartley
ra Lab03 Free-Fall Acceleration Name IV. Post-Lab Questions: litatively, how well did your value, ge compare to the known value for g? Cite % E. 2. Qualitatively, how well did your value, gem, compare to the known value for g? Cite % E. 3. Qualitatively, how well did your lab value for the acceleration, , compare to your acceleration, gsm? Cite % D. lab value for the 4. Qualitatively, how well did your value for ms, compare to your value for m. Cite %D 5. Consider the results of #1, #2, 3, &#4. Qualitatively, what does the relative magnitudeofthes % suggest to you about the relationship between the mass vs the free-fall acceleration of falling objects? 6. Describe Aristotles thoughts on the falling motion of light vs heavy objects. 7. Describe Galileos thoughts on the falling motion of light vs heavy objects. 8. Who was right about the motion of falling objects- Aristotle or Galileo?
B0Sll Acceleration Labos Name to ewtons Law of Gravity to derive a symbolic formula for estimating the mass of the Ea thr 9 E ito the surface acceleration, g, the universal gravitational constant G, & the radius of the Earth. REa MEarth-lab 10. Use your two lab values, &Bm, to compute gg (in Excel Table) 11 Now use gng to determine the mass of the Earth, M (in Excel Table) Lab03 -Free-Fall Mass of the Earth m/sec compute avg of gab REarth-boak 6.378E+06 G 6.674E-11 Nm/lg compare Martl to Martbok MEart-book 5.972E+24 compute M Earth! MEarthlab = kg kg 12. Compute the %E between MEarth lab & M Earth book, (in Excel) Cite below the symbolic formula for the %E for these masses. Remember to attach the 2 plots to back of the lab paper 27 Jan 19 Physics1-Hartley
Name - Free-Fall Acceleration Data Tables & Calcul Lab03 Free-Fall Free-Fall Data-Large Bai Ay (cm) -50.0 60.0 -70.0 -10.0 -20.0 30.0 -40.0 t1 (sec) t2 (sec) ts (sec) ta (sec) ts (sec) (ec) z (t rge ball ma ssm large slo compare g to 980 Lab03Free-Fall Free-Fall Data Small Ball Ay (cm) -50.0 At (see) t1 (sec) z (sec) ty (see) 4 (sec) -10.0 20.0 -30.0 40.0 -60.0 -70.0 ts (sec) (sec) small ball mass, m gm small slope - e/sec compare m to m, compare g to g %D- %D = compare to Physics1-Hartley 27 Jan 19
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Answer #1

Solution,

Average speed = distance /time taken

Time = distance /avg speed = 1.65/191 = 0.00864 sec

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