March 30, 2017

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A race car traveling northward on a straight, level track at a constant speed travels 0.750km in 20.0s. The return trip over the same track is made in 25.0s. What is the average velocity of the car in m/s for the first leg of the run? What is the average velocity for the total trip

  • physics - ,

    For the 1st leg of the run:
    velocity(ave) = displacement/time= 750/20=37.5 m/s
    For the total trip:
    velocity(ave) = displacement/time= 0
    speed (ave) = distance/time= 1500/45 =33.3 m/s

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