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Math Help - Labelling Diagrams

  1. #1
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    Labelling Diagrams

    Find the magnitude and the direction of the resultant of each of the following systems of forces.

    a) forces of 3 N and 8 N acting at an angle of 60 to each other


    My questions are:

    Did I label the diagram correctly according to the homework question above?
    Is the 60 between the 3 N and 8 N as shown in the diagram?
    Is the θ I am trying to find in the correct place or is it between the resultant and force of 3 N?


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  2. #2
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    Quote Originally Posted by Macleef View Post
    Find the magnitude and the direction of the resultant of each of the following systems of forces.

    a) forces of 3 N and 8 N acting at an angle of 60 to each other


    My questions are:

    Did I label the diagram correctly according to the homework question above?
    Is the 60 between the 3 N and 8 N as shown in the diagram? Mr F says: No. The angle where you have the 60 degrees is actually 120 degrees. The angle between two vectors is the angle between them when they are joined tailed-to-tail. So the 60 should actually be 'on the other side' of where you currently have it.


    Is the θ I am trying to find in the correct place or is it between the resultant and force of 3 N?


    You red resultant vector is in the correct place, however.
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