While you are traveling in a car on a straight, levelinterstate highway at 90 km

Question

While you are traveling in a car on a straight, levelinterstate highway at 90 km/h, another car passes you in the samedirection, its speedometer reads 120 km/h. a). What is your velocity relative to the other driver? b). What is the other car's velocity realtive to you? While you are traveling in a car on a straight, levelinterstate highway at 90 km/h, another car passes you in the samedirection, its speedometer reads 120 km/h. a). What is your velocity relative to the other driver? b). What is the other car's velocity realtive to you?

Explanation / Answer

             Given that the velocity of the car1 is U1 = 90 km/h                               thevelocity of the car2 is U2 = 120 km/h   -------------------------------------------------------------------------------          (a) Therelative velocity of the car1 relative to the car2 is V12 =U1 - U2                                                                                                         =- 30km/h         (b)  The relative velocity of the car2 relative to thecar1 is V21 = U2 - U1                                                                                                         = +30km/h                                                                                                                          = +30km/h          

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