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For instance, a 2004 Chevrolet Impala had an optimum at 42 mph (68 km/h), and was within 15 percent of that from 29 to 57 mph (47 to 92 km/h). Simple model for energy vs vehicle speed. Air resistance is the main cause expended energy per distance when driving at high steady speeds. [11]
Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling resistance and vehicle's air drag.
is given in miles per hour Track lubrication on a reverse curve in an area prone to movement due to wet beds. Normally, passenger trains run above the balancing speed, and the difference between the balancing superelevation for the speed and curvature and the actual superelevation on the curve is known as unbalanced superelevation.
An electronic odometer (below speedometer) with digital display showing 91,308 miles (146,946 km) from a Jeep Grand Cherokee (WJ). An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car.
Escape speed at a distance d from the center of a spherically symmetric primary body (such as a star or a planet) with mass M is given by the formula [2] [3] = = where: G is the universal gravitational constant (G ≈ 6.67×10 −11 m 3 ·kg −1 ·s −2)
Dorothy Levitt, in a 19 kW (26 hp) Napier, at Brooklands, England, in 1908. The FIA does not recognize separate men's and women's land speed records, because the records are set using motorized vehicles, and not muscle-powered vehicles, so the gender of the driver does not matter; however, unofficial women's records have long been claimed, seemingly starting with Dorothy Levitt's 1906 record ...
Speed limits are enforced with a small tolerance. In urban areas, driving merely 3 km/h (2 mph) or faster above the posted or implied speed limit is considered a punishable infraction in Germany. If the speed limit is 100 km/h (62 mph) or more, the tolerance is 3%. Other tolerances may apply for mobile speed cameras and undercover police cars.
The distance covered is 23.25 km (more than double the 11 kilometers of the NEDC). [5] The key differences between the old NEDC and new WLTP test are that WLTP: [4] has higher average and maximum speeds; includes a wider range of driving conditions (urban, suburban, main road, highway) simulates a longer distance; has higher average and maximum ...
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