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Speed and VelocityIntroductionScalars and VectorsDistance and DisplacementSpeed and VelocityAccelerationJust as distance and displacement have distinctly different meanings (despite their similarities), so do speed and velocity. Speed is a scalar quantity that refers to “how fast an object is moving.” Speed can be thought of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a short amount of time. Contrast this to a slow-moving object that has a low speed; it covers a relatively small amount of distance in the same amount of time. An object with no movement at all has a zero speed. Velocity as a Vector QuantityVelocity is a vector quantity that refers to “the rate at which an object changes its position.” Imagine a person moving rapidly – one step forward and one step back – always returning to the original starting position. While this might result in a frenzy of activity, it would result in a zero velocity. Because the person always returns to the original position, the motion would never result in a change in position. Since velocity is defined as the rate at which the position changes, this motion results in zero velocity. If a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. Every step must go into moving that person further from where he or she started. For certain, the person should never change directions and begin to return to the starting position.Velocity is a vector quantity. As such, velocity is direction aware. When evaluating the velocity of an object, one must keep track of direction. It would not be enough to say that an object has a velocity of 55 mi/hr. One must include direction information in order to
\t\xa0SpeedVelocitySpeed\xa0is the distance covered by a body in unit time.Velocity\xa0is the displacement covered by a body in a unit time.It is a scalar quantity.It is a vector quantity.It Determines “How fast an object is moving”?It determines “In which direction an object is moving”?It indicates the rapidity of objects.It indicates both the rapidity and position of the object.It is the rate of change of distance.It is a rate of change of displacement.It cannot be negative.The velocity of moving Objects can be negative, positive or can be zero.\t
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