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What equation do i use?

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- #1

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What equation do i use?

- #2

Science Advisor

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If the car slows from 26.0 m/s to rest (0 m/s) in 4.5 s then its acceleration is (0- 26)/4.5= -5.78 m/s

Do you know the formula s= (1/2)at

Actually, that's the "hard" way- for this problem you can use the fact that, with a constant acceleration, the "average" speed is just the average of the initial and final speeds. What is the average of 26.0 and 0? If you go at that average speed for 4.5 seconds, how far do you go? Do the problem both ways and compare the answers!

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