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9. A truck covers 40.0 m in 8.50s while uniformly slowing down to a final velocity of 2.80 m/s. (a) Find the truck's original speed.

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9. A truck covers 40.0 m in 8.50s while uniformly slowing down to a final velocity of 2.80 m/s. (a) Find the truck's original speed. (b) Find its acceleration. 10. A person takes a trip, driving with a constant speed of 89.5 km/h, except for a 22.0 - min rest stop. If the person's average speed is 77.8 km/h, (a) how much time is spent on the trip and (b) how far does the person travel

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