SOLUTION: a car and a truck is traveling north on a highway. the truck has a speed of 45 miles per hour and the car has a speed of 57 miles per hour. if the truck is ahead of the car, what i

Question 558685: a car and a truck is traveling north on a highway. the truck has a speed of 45 miles per hour and the car has a speed of 57 miles per hour. if the truck is ahead of the car, what is the relative velocity?
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!
The car is catching up to the truck at a rate of 57-45 or 12 miles per hour.
The distance between them is shrinking at a rate of 12 miles per hour.
But since it's shrinking their relative velocity is -12 miles per hour.
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