Question

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A car travels at a constant velocity of 70 mph for one hour. At the second hour, the car’s velocity was 60 mph. At the third hour, the car’s velocity was 80 mph. At what hour was their positive acceleration? At what hour was their negative acceleration?

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Answer 1

The third hour increased by 20 percent. The second hour was decreased by 10 percent. So third hour decreased and second hour increased.