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Scalar quantity which is the magnitude of velocity.

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Everyday when I'm going back home from college, I pass by this big radar speed sign and I've noticed that it does a peculiar thing. The sign is placed on a downward slope of the street. So say I'm … driving on 35 MPH, and I let my foot off the gas pedal completely, the street makes my car go a little faster since it's steep, and my speedometer reads 40 MPH, but the speed on the radar goes down …
asked Nov 26 '15 by Y.G.