Answer: Increases the distance required to stop
Speed ________
In everyday use and in kinematics the speed (commonly referred to as v) of an object is the magnitude of the change of its position; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero. Speed h…
In everyday use and in kinematics the speed (commonly referred to as v) of an object is the magnitude of the change of its position; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero. Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second but the most common unit of speed in everyday usage is the kilometre per hour or in the US and the UK miles per hour. For air and marine travel the knot is commonly used. The fastest possible speed at which energy or information can travel according to special relativity is the speed of light in a vacuum c = 299792458 metres per second (approximately 1079000000 km/h or 671000000 mph). Matter cannot quite reach the speed of light as this would require an infinite amount of energy. In relativity physics the concept of rapidity replaces the classical idea of speed.
Historical definition Italian physicist Galileo Galilei is usually credited with being the first to measure speed by considering the distance covered and the time it takes. Galileo defined speed as the distance covered per unit of time. In equation form that is
Historical definition Italian physicist Galileo Galilei is usually credited with being the first to measure speed by considering the distance covered and the time it takes. Galileo defined speed as the distance covered per unit of time. In equation form that is ${\displaystyle v={\frac {d}{t}} }$ where ${\displaystyle v}$ is speed ${\displaystyle d}$ is distance and ${\displaystyle t}$ is time. A cyclist who covers 30 metres in a time of 2 seconds for example has a speed of 15 metres per second. Objects in motion often have variations in speed (a car might travel along a street at 50 km/h slow to 0 km/h and then reach 30 km/h). Instantaneous speed Speed at some instant or assumed constant during a very short period of time is called instantaneous speed. By looking at a speedometer one can read the inst...
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