Question

A three-wheeled car moving along a straight section of road starts from rest, accelerating at 2.00 m/s² until it reaches a speed of 26.0 m/s. Then the vehicle moves for 77.0 s at constant speed until the brakes are applied, stopping the vehicle in a uniform manner in an additional 5.00 s. (a) How long is the three-wheeled car in motion (in s)? (b) What is the average velocity of the three-wheeled car for the motion described? (Enter the magnitude in m/s.) m/s

Answer 1

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t, id, taide Const velocity decebration ( 4 ) accelarating t = -1 13% 26-0 2 t = 58 (Guiee.] > t = 778. Cuvee] t = t,+ te + tz = 13+77 +5 958

26x5 + //*-5-2x52 138 (6) Distance tacuueled ceraing it - di- cit, +yat} = 0+%, x2x133 = 169m ad, a ut, = 26x7 7 = 2002 m V-u 0-26 -5.2 m/32 $ ats s a) dz + 3 3 - 65m D=d, + d₂ + z = 169 +2002 + 65 = 2236m 2236 Vang D 2236-23-54 wys - t 95

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