VECTOR AND SCALAR QUANTITIES.

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Presentation transcript:

VECTOR AND SCALAR QUANTITIES

FRAME OF REFERENCE - a set of axes relative to which an observer can measure the position and motion of all points in a system, as well as the orientation of objects in it.

SCALAR QUANTITY A quantity define by magnitude only (Ex) 5 meters 4 kg 50 kilometers per hour (kph) 60 degrees

VECTOR QUANTITY A quantity that requires both magnitude and direction. (Ex) 5 meters north (5 m N) 35 km NNE 65 newtons to the left (65 N left) 13 m/s down

DIRECTIONS 22.5 o W of N 67.5 o N of W 90 270 180

VECTOR QUANTITY - Represented by the an arrow; length of the arrow indicates the magnitude and direction of the arrow indicates its direction.

GRAPHICAL METHOD = = VECTOR ADDITION The vectors are added using the head-to-tail method. Magnitude can be measured and the direction determined through the use of a protractor (Ex.) = =

EFFECT OF WIND ON A PLANE’S VELOCITY

DISTANCE VS DISPLACEMENT

DISTANCE – scalar quantity DISPLACEMENT – vector quantity A car travels 50 km to the East and then 20 km to the West, the total distance traveled is 70 km, but your displacement is 30 km East. E