Question: At a given instant, a car on a roller coaster has velocity vector v = (25, 35, 10) (in miles per hour). What would the

At a given instant, a car on a roller coaster has velocity vector v = (25, −35, 10) (in miles per hour). What would the velocity vector be if the speed were doubled? What would it be if the car’s direction were reversed but its speed remained unchanged?

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