# Displacement Vector

What is a scalar? A scalar is a quantity that is fully described by a magnitude only. It is described by just a single number. Some examples of scalar quantities include speed, volume, mass, temperature, power, energy, and time. What is a vector? A vector is a quantity that has both a magnitude and a direction. Vector quantities are important in the study of motion. Some examples of vector quantities include force, velocity, acceleration, displacement, and momentum.

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Displacement (vector) - Wikipedia, the free encyclopedia : Very Important - the distance travelled is not necessarily the same as the displacement vector!

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The trajectory of a particle (in red) along a curve inside a vector field. Starting from a, the particle traces the path C along the vector field F. The dot product (green line) of its displacement vector (red arrow) and the field vector (blue arrow) defines an area under a curve, which is equivalent to the path's line integral.

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Describing Projectiles With Numbers: Horizontal and Vertical Displacement: This page from The Physics Classsroom makes the projectile mathematics of how far or how high seem easy.

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This animation shows the two dimensional displacement vector along with its x- and y-component.

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