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# What is the definition of the term "vector quantity"?

**A vector quantity is a quantity of something which possesses both magnitude and direction.** Magnitude is simply the size or amount of the quantity. For example, the magnitude of the quantity eight miles per hour is eight. Direction is meant in the ordinary sense, where the quantity is headed.

An example of a vector quantity that should be very familiar is an expression like "go 10 miles east" when offering directions. In this example, 10 is the quantity and east is the direction. Both the direction and magnitude of the movement are necessary to get the person needing directions to the right location.

Vector quantities are used extensively throughout physics to describe physical systems and to calculate the effects that different parts of the system have upon one another. Examples of vector quantities used in physics include velocity, acceleration, force, lift and weight.

In physics, speed is considered a scalar quantity, a quantity that lacks direction and only has a magnitude. When a magnitude of speed is paired with a direction, it becomes a velocity. Direction is important. When two or more vectors come into contact with one another, their magnitudes are summed together depending upon their directions. Vectors which are moving in the same direction will have their sum magnitude increased, while those moving in opposition will have their sum magnitude decreased.

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Q:
## Is velocity a vector?

A: Velocity is a vector since it is composed of a quantity of speed and a direction. Velocity is defined as the rate at which an object's position changes. Full Answer >Filed Under: -
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## Why do we say force is a vector quantity?

A: Force is classified as a vector quantity because it is a quantity that has both direction and magnitude (numerical value). Force is measured by the standar... Full Answer >Filed Under: -
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## What is the formula for finding speed?

A: The general formula for finding speed is x = d / t, where "x" denotes the speed, "d" indicates the distance traveled and "t" represents the time it takes t... Full Answer >Filed Under: -
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## What is vector quantity in physics?

A: Vector is a quantity that has magnitude and direction. It is represented by an arrow that has the same direction as the quantity and whose length is propor... Full Answer >Filed Under: