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A race car travels northward on a straight, level track at a constant speed travels 0.764 km in 17.0 s. The return trip over the same track is made in 22.0 s.
(a) What is the average velocity of the car in m/s for the first leg of the run?
m/s
(b) What is the average velocity for the total trip?
A freight car with a mass of 2500 kg rolls down an inclined track through a vertical distance of 1.5m. at bottom of the incline, on a level track, the car collides and couples with the identical freight car that was at rest. What percentage of th..
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