1-D motion with two different constant acceleration segments (Example) скачать в хорошем качестве

1-D motion with two different constant acceleration segments (Example)

[1D motion example]. A car, starting from rest, accelerates for 6.00 seconds with an acceleration of (5.00 m/s^2, EAST). At the end of this initial 6.00 second interval, the car continues Eastward with a constant velocity (equal to whatever velocity it had at the end of the initial 6.00 second interval) for another 4.00 seconds. The total displacement and average velocity for the first 10.0 seconds of the car's motion is calculated. Alternative solutions are outlined. 0:00 Overview 0:30 Problem statement 1:12 choose coordinate system 1:58 Part (a): calculate total displacement 3:00 ... calculate displacement for 1st segment 4:25 ... calculate displacement for 2nd segment 5:10 (final veloc. for 1st segment is initial veloc. for 2nd segment) 5:40 (calculating final velocity for 1st segment) 6:40 ... finishing up calculation of displacement during 2nd segment 7:16 TOTAL displacement (finishing up) 7:47 Part (b): calculate AVERAGE VELOCITY 8:33 ... meaning of average velocity 9:20 Concluding Remarks 9:23 [#1] const. accel. eqns. CANNOT be used for time intervals that include different accelerations 10:05 [#2] clock resets to zero at the beginning of each new segment 10:43 [#3] outline of alternative solutions [Brief production notes: 4-ft wide lightboard {   • Looney home lightboard (2 minute overview)  }. Camera: 2017 iPad pro. Camera settings: ISO 30, shutter speed 1/180, white Temp 5200K. 30 frames/sec, 1080p; MoviePro camera app.]