EIl Heinle Hene lackboard Sapling Learning LON-CAPA Co.. Contents Calc 142 Hw 20

Question

EIl Heinle Hene lackboard Sapling Learning LON-CAPA Co.. Contents Calc 142 Hw 200 Level Phy.ath Caroina Myintertase Cuirary and th Carolina Catalog-Mtry Sr Jami Winn (Student -section: E01) Physics 211-E01, Spring 2016(cook) Messages Courses Help Logout Notes W Bookmark à Evaluate Communicate-Pret ntrfo A car (m-650.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h- 43.0 m. Find the average Course Contents » » Hwr7s car driving uphill Notes "Bookmark à Evaluate-communicate mt power the engine must deliver to reach a speed of 24.3 m/s at the top of the hill in 16.3 S(NEGLECT frictional losses: air and rolling,... Submt Anawer Tries 0/8 This discussion is closed. Send Feedback

Explanation / Answer

Applying equation of motion : V = U + a*t

===> 24.3 = 0 + a* 16.3

Hence a = 1.49079 m/s2

we can find the length of the incline : S = U*t + .5*a*t2

therefore S = 0 + 0.5*1.4907*(16.3)2 = 198.045 m.

Hence average power = m*a*S / t = 650*1.4907*198.045 / 16.3 = 11773.51403 watts = 11.77351403 kilowatts

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