VECTORS ( ADDITION / SUBRACTION )

HOW TO USE THIS APPLET

Shift-drag: Hold down the shift key, then drag the described object.
Control-drag: Hold down the control key, then drag the described object.
Control-shift-drag: Hold down both the control key and the shift key, then drag the described object.

Select the r = u + v button to analyze vector addition (r is the resultant of adding u and v). Select either the u = r - v button or the v = r - u button to analyze vector subtraction.
Dragging the terminal point of a vector may cause the "fixed" vector to change. You can manually change the "fixed" vector by selecting the:
- FIX u button or the FIX v button in "r = u + v" mode.
- FIX r button or the FIX v button in "u = r - v" mode.
- FIX r button or the FIX u button in "v = r - u" mode.
Use the SET A VECTOR MAGNITUDE pop-up menu to change the magnitude of either of the two vectors being added or subtracted.
Use the SET THE DIRECTION TYPE pop-up menu to set the direction type to "mathematical direction", "reference direction", "bearing" or direction relative to one of the two vectors being added or subtracted.
Use the SET A VECTOR DIRECTION pop-up menu to change the direction of either of the two vectors being added or subtracted (in the direction type selected).
Use the CENTER button to center the vector parallelogram in the graph area (when none of the vectors extend beyond the graph area).
Use the RESET button to restore the applet to the initial state.

Drag the terminal point of any vector to change the magnitude and direction of the vector.
Shift-drag the terminal point of any vector to change the magnitude of the vector.
Control-drag the terminal point of any vector to change the direction of the vector.
Drag inside the vector parallelogram diagram to translate all of the vectors.
Drag outside the vector parallelogram diagram, towards or away from the common initial points to change the scale (size) of the vector diagram.
Control-shift-drag inside the vector diagram to rotate all of the vectors.

Mouse-over the magnitude of a vector at the top of the screen to see that vector (and magnitude) in isolation.
Mouse-over the direction of a vector at the top of the screen to see that vector (and direction) in isolation.