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19 Nov 2019
When a car skids to a stop, the length L, in feet, of the skid marks is related to the speed, S, in miles per hour (mph), of the car by the function L = S^2/30h. In this formula, h is a constant that depends on the road surface (the friction coefficient). For dry concrete pavement, the value of h is about 0.85. If a driver going 55 mph on dry concrete jams on the brakes and skids to a stop, how long will the skid marks be? 1186 feet 85.71 feet 4.65 feet 118.6 feet
When a car skids to a stop, the length L, in feet, of the skid marks is related to the speed, S, in miles per hour (mph), of the car by the function L = S^2/30h. In this formula, h is a constant that depends on the road surface (the friction coefficient). For dry concrete pavement, the value of h is about 0.85. If a driver going 55 mph on dry concrete jams on the brakes and skids to a stop, how long will the skid marks be? 1186 feet 85.71 feet 4.65 feet 118.6 feet
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Beverley SmithLv2
25 Oct 2019
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