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22 Dec 2017
2.12 . Figure E2.12 shows the velocity of a solar-powered car as a function of time. The driver accelerates from a stop sign, cruises for 20 s at a constant speed of 60 km/h, and then brakes to come to a stop 40 s after leaving the stop sign. (a) Compute the average acceleration during these time intervals: (i) = 0 to 1 = 10 s; (ii) 1 = 30 s to t = 40 s; (iii) = 10 s to 1 = 30 s: (iv) t = 0 tot = 40 s. (b) What is the instantaneous acceleration at 20 s and att = 35 s? Figure E2.12 v (km/h) 8 o 5 10 15 20 25 30 35 40
2.12 . Figure E2.12 shows the velocity of a solar-powered car as a function of time. The driver accelerates from a stop sign, cruises for 20 s at a constant speed of 60 km/h, and then brakes to come to a stop 40 s after leaving the stop sign. (a) Compute the average acceleration during these time intervals: (i) = 0 to 1 = 10 s; (ii) 1 = 30 s to t = 40 s; (iii) = 10 s to 1 = 30 s: (iv) t = 0 tot = 40 s. (b) What is the instantaneous acceleration at 20 s and att = 35 s? Figure E2.12 v (km/h) 8 o 5 10 15 20 25 30 35 40
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Patrina SchowalterLv2
23 Dec 2017
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