Q:

What is the equation for speed?

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Quick Answer

The most common equation for speed is: speed = distance / time. It can also be expressed as the time derivative of the distance traveled. Mathematically, it can be written as v = s/t, or v = (ds/dt), where speed is denoted by v, distance is denoted by s, and time is denoted by t. In case of uniform velocity, the first equation is used.

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What is the equation for speed?
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Full Answer

Speed is often confused with velocity and is thought to have the same meaning. In terms of physics, speed and velocity are two different things. Speed is a scalar quantity, which means that there is no direction attached with its definition and only represents the magnitude of its velocity. Velocity is a vector quantity and represents both the speed of an object and its direction. For example if a car travels north at 40 miles per hour, then its speed is 40 miles per hour and its velocity is 40 miles per hour to the north.

Speed is associated with the concept of distance, whereas velocity is associated with displacement. Distance, a scalar quantity, represents the length an object has covered during its time of motion. Displacement, a vector quantity, represents how far the object has moved away from its initial position during its time of motion.

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Related Questions

  • Q:

    How is speed calculated?

    A:

    Speed is also known as velocity, and it is calculated by dividing the distance traveled by the amount of time it took to cover that distance. This is expressed as a standard equation: V = D / T.

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  • Q:

    What is the equation for velocity?

    A:

    The equation for velocity is displacement divided by time. The equations for speed and velocity are similar, but velocity must always have direction, whereas speed does not.

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  • Q:

    What is average velocity?

    A:

    Average velocity is the displacement of an object, divided by the time it took to cover that distance. Displacement is the straight line distance between the starting point and ending point of an object's motion. Velocity is referred to as a vector quantity because it has both magnitude and direction.

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  • Q:

    What is "constant speed"?

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    "Constant speed" is speed maintained consistently over time. To achieve constant speed, an object has to cover an equal distance for equal intervals of time. The acceleration of the object is zero when it is traveling at a constant speed.

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