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Answer to Question #53757 in Mechanics | Relativity for Joseph

Question #53757
Jed was driving his car at 40km/hr on a subdivision where the speed limit is 20km /hr. He was spotted by an officer in a motorcycle, who accelerates in pursuit. By the time jed sees the officers motorcycle it was traveling at 60km/ hr. What is the officer's velocity relative to jed car.
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28.07.15, 15:14

When asking about relative velocity, all that means is the perceived velocity of the policeman by Jed. Since Jed is traveling at 40km/hr and the policeman is traveling at 60km/hr relative to the earth, the policeman's relative velocity to Jed is:

60km/hr - 40km/hr = 20km/hr.

The policeman is traveling at 20km/hr relative to Jed.

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