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Vectors
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Vectors Any quantity that requires both magnitude and direction for a complete description is a vector quantity. A quantity that can be described by magnitude only, not involving direction is called a scalar quantity.
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Vectors A vector quantity is represented by an arrow.
The length of the arrow represents the quantity’s magnitude Direction points towards the movement.
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Vectors The sum of two or more vectors is called their resultant.
To find the result of two vectors we use the parallelogram rule
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Parallelogram Rule A parallelogram is a four-sided figure with opposite sides parallel to each other. Usually you determine the length of the diagonal by measurement, but in the special case in which two vectors X and Y are perpendicular, you can apply the Pythagorean Theorem, R2=X2+Y2 R= ( 𝑋 2 + 𝑌 2 )
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Parallelogram Rule Construct a parallelogram within the two vectors are adjacent sides – the diagonal of the parallelogram shows the resultant.
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Components of Vectors
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Components of Vectors Just as two vectors at right angles can be combined into one resultant vectors any vector can be resolved into two component vectors perpendicular to each other
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Components of Vectors A vector V is drawn in the proper direction to represent a vector quantity. Then vertical and horizontal lines (axes) are drawn at the tail of the vector.
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Components of Vectors Next, a rectangle is drawn that has V as its diagonal. The sides of this rectangle are the desired components vectors X and Y.
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