decompose a force to its components
Posted on 2009-07-08
hi, i am rreading some examples in statics and as i decompose the force into its components i have notices that although (for example) the angle between the force and the x-axis is 45 degrees when we work the example we wometimes take angle of 135 degrees. I understand that it is 90+45 but my question is....do we start counting the degrees from the positive x-axis or in general from the positive x,y,z axis and we move clockwise ?
Any input would be appreciated.