A Toyota Prius driving north at 56.0mph and a VW Passat driving south at 38.0 mp

Question

A Toyota Prius driving north at 56.0mph and a VW Passat driving south at 38.0 mph are on the same road heading toward each other (but in different lanes). (We take the positive direction to be north.)

What is the velocity of Toyota Prius relative to the VW Passat when they are 350 ft apart, just before they meet?

What is the velocity of VW Passat relative to the Toyota Prius when they are 350ft apart, just before they meet?

What is the velocity of Toyota Prius relative to the VW Passat when they are 525 ft
apart, after they have passed each other?

What is the velocity of VW Passat relative to the Toyota Prius when they are 525 ft apart, after they have passed each other?

Explanation / Answer

part a)

relative velocity=56-42=14

because both of them are approaching each other

part b)

relative velocity=42-56=-14

because

both of them are approaching each other

part c)

relative velocity=56+42=98

both of them are leaving each other

part d)

relative velocity=42+56=98

both of them are leaving each other

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