Ch. 2.3 Inst × . -) C Secum https://session AP Physics 1 2018-2019 h. 2.3 Instan

Question

Ch. 2.3 Inst × . -) C Secum https://session AP Physics 1 2018-2019 h. 2.3 Instantaneous Velocity roblem 2.17 Part A Constants A car starts from 15 m at 0 and moves with the velocily graph shown in fgure below. (Figure 1) what is to object's position at t = 2 s? Express your answer using two significant figures. Submit Reqvest Answer Part B What is to oters posion at t-3s? Express your answer using two significant figures Figure 1 of 1 v, (m/s) 12 ? t (s) Part C whattho otiecrs position at t = 4 s? Express your answer 8 2 9

Explanation / Answer

a) final position after 2 sec given by

X= Xo + area under v-t curve(i.e area of trapezium)

= 15+ 0.5* sum of parallel side* height

= 15+ 0.5* ( 4+12)*2

= 31 m

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Position at t= 3

X= xo + area of triangle

= 15+ 0.5*12*3

= 33 m

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Final position aftr 4 second

X= final position till t= 3 sec - area of small triangle below the time axis

= 33- 0.5* 4*4

= 25 m

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Commemt in case any doubt . good luck

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