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A certain roller coaster accelerates its cars 6.35 m/sec(s2) up the first incline. If this acceleration happens during the first 7.0 s of the ride, how much does the speed of the roller coaster cars increase?

A certain roller coaster accelerates its cars 6.35 m/sec(s2) up the first incline. If this acceleration happens during the first 7.0 s of the ride, how much does the speed of the roller coaster cars increase? I divided 6.35 m/s2 by 7.0 s and got my answer of 0.91 m/s. I'm not to sure how to...