7.2. Operations with Vectors http://www.ck12.org
7.2 Operations with Vectors
Here you will add and subtract vectors with vectors and vectors with points.
When two or more forces are acting on the same object, they combine to create a new force. A bird flying due south
at 10 miles an hour in a headwind of 2 miles an hour only makes headway at a rate of 8 miles per hour. These forces
directly oppose each other. In real life, most forces are not parallel. What will happen when the headwind has a
slight crosswind as well, blowing NE at 2 miles per hour. How far does the bird get in one hour?
Watch This
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/61368http://www.youtube.com/watch?v=EYIxFJXoUvA James Sousa: Vector Operations
Guidance
When adding vectors, place the tail of one vector at the head of the other. This is called thetail-to-head rule. The
vector that is formed by joining the tail of the first vector with the head of the second is called theresultant vector.
Vector subtraction reverses the direction of the second vector.−→a−−→b=−→a+(−−→b):