5.1 Vector and Scalar Quantities

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Presentation transcript:

5.1 Vector and Scalar Quantities A vector quantity includes both magnitude and direction, but a scalar quantity includes only magnitude.

5.1 Vector and Scalar Quantities A quantity that requires both magnitude and direction for a complete description is a vector quantity. Velocity is a vector quantity, as is acceleration. Other quantities, such as momentum, are also vector quantities.

5.1 Vector and Scalar Quantities A quantity that is completely described by magnitude is a scalar quantity. Scalars can be added, subtracted, multiplied, and divided like ordinary numbers. When 3 kg of sand is added to 1 kg of cement, the resulting mixture has a mass of 4 kg. When 5 liters of water are poured from a pail that has 8 liters of water in it, the resulting volume is 3 liters. If a scheduled 60-minute trip has a 15-minute delay, the trip takes 75 minutes.

5.1 Vector and Scalar Quantities How does a scalar quantity differ from a vector quantity?