Thursday, Jan. 29 th p. 150, 151

Thursday, Jan. 29 th 150 1/29/15 Thurs. L.T.: I can collaboratively gather data, refine it through calculations, and graph my results. DO NOW: If this is what we got for our fan car data, how would we calculate the avg. speed in met/sec? Reflection: How well were you able to work as a team to gather data? Were you a responsible contributor? How thoroughly were you able to fill out your data table? Were you able to accurately graph both cars’ speeds onto your line graph? 151 Title: Constant Speed or Acceleration? 3 Also see data table from yesterday’s right side… Data for _________________ Car 4 th period: You know how to alter your data table! Tape in graph for both cars Section (cm) T1T2T3Avg. Time Avg. Speed Section (cm)Avg. Time (sec)Avg. Speed (met/sec) sec0.22 met/sec sec0.26 met/sec sec0.28 met/sec sec0.29 met/sec

Jobs Team Leader (1): does Ms. Kim’s job of organizing and orchestrating the data collecting. Knows everyone’s jobs by heart and has leadership like a leader, not a boss. Timer (4-8): accurately times the car passing through their section; reports out to calculator or Ms. Kim their data Calculator (4*): in the case of multiple timers, calculator must gather data and calculate average and report to Ms. Kim Mechanic (1): must keep car tuned up and ready to go at all times. Only one to handle supplies. Must be patient and quick. Releases car at Team Leader’s signal. Mechanic’s Help (1*): receives the car on the other end and assists Mechanic with any repairs; sweeps before each trial *if we have enough people – these jobs get filled in last

Graphing We are line graphing BOTH cars’ avg. speeds onto the graph! Title: Distance vs. Avg. Speed (Do TAILS) Color code to distinguish between the 2 cars’ average speeds and make a key VL 2, supplies are in the back! If you do not finish here, please finish at home, as in HOMEWORK…

2 nd period Sections (cm) T1T2T3Avg. TimeAvg. Speed sec0.22 m/s sec0.34 m/s sec0.37 m/s sec0.40 m/s Sections (cm) T1T2T3Avg. TimeAvg. Speed sec0.67 m/s sec0.89 m/s sec1.92 m/s sec1.32 m/s Fan Car Mousetrap Car

3 rd period Sections (cm) T1T2T3Avg. TimeAvg. Speed sec1.65 sec2.17 sec1.71 sec0.29 m/s sec2.70 sec2.30 sec2.18 sec0.23 m/s sec2.90 sec2.65 sec2.36 sec0.21 m/s sec2.58 sec1.25 sec1.60 sec0.31 m/s Sections (cm) T1T2T3Avg. TimeAvg. Speed sec 0.37 sec0.52 sec0.96 m/s sec0.67 sec0.52 sec0.57 sec0.88 m/s sec0.54 sec0.56 sec0.51 sec0.98 m/s sec0.48 sec0.38 sec0.43 sec1.16 m/s Fan Car Mousetrap Car

4 th period Sections (cm) T1T2T3Avg. TimeAvg. Speed s0.30 s0.33 s s0.53 s0.99 s s1.34 s1.38 s s0.66 s1.07 s s0.67 s0.79 s s0.57 s1.08 s s0.95 s1.12 s s0.84 s1.30 s Sections (cm) T1T2T3Avg. TimeAvg. Speed s0.25 s0.23 s s0.36 s0.42 s s0.59 s0.51 s s0.39 s0.35 s s0.28 s0.43 s s0.29 s0.31 s s0.27 s0.51 s s0.37 s0.42 s Fan Car Mousetrap Car

5th period Sections (cm) T1T2T3Avg. TimeAvg. Speed s2.60 s3.20 s2.86 sec0.17 m/s s1.70 s2.40 s2.36 sec0.21 m/s s1.32 s2.54 s2.25 sec0.22 m/s s1.59 s1.31 s1.82 sec0.27 m/s Sections (cm) T1T2T3Avg. TimeAvg. Speed s0.86 s0.71 s0.76 sec0.66 m/s s0.44 s0.56 s0.50 sec1.00 m/s s 0.47 s0.40 sec1.25 m/s s0.37 s0.46 s0.45 sec1.11 m/s Fan Car Mousetrap Car S = d/t We want avg. speed in met/sec! Remember to convert your d into meters from cms….