Lesson 1.1: Vector Addition

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9 Terms

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Scalar Quantity

a quantity that is described by a magnitude (or numerical value) alone

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Vector quantity

a quantity that is fully described by both magnitude and direction

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Scalar quantity:

  • Time

  • Mass

  • Length

  • Distance

  • Speed

  • Power

  • Energy

  • Work

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Vector quantity

  • Displacement

  • Velocity

  • Acceleration

  • Force

  • Weight

  • Friction

  • Impulse

  • Momentum

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Scalar

25 km, which shows distance

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Scalar

100 kg, which describes a mass

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Vector

200 Newton upward, which describes a force of 200 N directed upward

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Vector

25 km/h East, which tells the velocity of a vehicle (the magnitude is 25 km/hr and direction is East)

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Scalar quantities follow ordinary arithmetic rules when being added while vector quantities do not.

This is one characteristic of vector quantity that made it important in the study of physics.