Answer to Question #280821 in Physics for Evan

Question #280821

You are riding a car moving north at a constant speed of 180 km/h. In the other lane is a truck that moves at a constant speed of 100 km/h to the south. Relative to you, what is the speed of the truck when it is approaching you?

Expert's answer

The relative speed is

"v_r=180+100=280\\text{ km\/h}."

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