Physics Help Forum Vector Addition & Subtraction problems
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 Sep 3rd 2008, 02:53 PM #1 Junior Member   Join Date: Aug 2008 Location: United States Posts: 24 Vector Addition & Subtraction problems Hello Everyone, I have a couple problems that I have no idea how to even start (maybe its because I have a hard time visualizing?) and would like anyone to help break it down to small steps for me so I can understand how to do them. Here are the questions. 1) A force vector F1 points due east and has a magnitude of 200 newtons. A second for F2 is added to F1. The resultant of the two vectors has a magnitude of 400 newtons and points along the east/west line. Find the magnitude and direction of F2. Note that there are two answers. 2) One displacement vector A has a magnitude of 2.43km and points due north. A second displacement vector B has a magnitude of 7.74km and also points due north. Part A)find the magnitude and direction of A-B Part B)Find the magnitude and direction of B-A. 3)Two displacement vectors A and B each point 35.0 degrees north of west. One has a magnitude of 4.60km, while the other has a magnitude of 3.20km. What are the magnitude and direction of the resultant vector A+B? 4) Vector A has a magnitude of 48.0 units and points due west, while Vector B has the same magnitude but points due south. Determine the magnitude and direction of A+B and A-B. Specifiy the direction relative to due west. 5) Two ropes are attached to a heavy box to pull it along the floor. One rope applies a force of 475 newtons in a direction due south. How much force should be applied by a single rope and in what direction (relative to due west), if it is to accomplish the same effect as the two force added together? I thank anyone in advance for helping me
Sep 3rd 2008, 04:46 PM   #2
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 Originally Posted by Rainy2Day Hello Everyone, I have a couple problems that I have no idea how to even start (maybe its because I have a hard time visualizing?) and would like anyone to help break it down to small steps for me so I can understand how to do them. Here are the questions. 1) A force vector F1 points due east and has a magnitude of 200 newtons. A second for F2 is added to F1. The resultant of the two vectors has a magnitude of 400 newtons and points along the east/west line. Find the magnitude and direction of F2. Note that there are two answers. 2) One displacement vector A has a magnitude of 2.43km and points due north. A second displacement vector B has a magnitude of 7.74km and also points due north. Part A)find the magnitude and direction of A-B Part B)Find the magnitude and direction of B-A. 3)Two displacement vectors A and B each point 35.0 degrees north of west. One has a magnitude of 4.60km, while the other has a magnitude of 3.20km. What are the magnitude and direction of the resultant vector A+B? 4) Vector A has a magnitude of 48.0 units and points due west, while Vector B has the same magnitude but points due south. Determine the magnitude and direction of A+B and A-B. Specifiy the direction relative to due west. 5) Two ropes are attached to a heavy box to pull it along the floor. One rope applies a force of 475 newtons in a direction due south. How much force should be applied by a single rope and in what direction (relative to due west), if it is to accomplish the same effect as the two force added together? I thank anyone in advance for helping me
This site should help considerably. Try them again, and remember to ALWAYS make a sketch, and let us know which ones you still need help with. In that case, any work you can show/describe to us will help us help you better.

-Dan
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Last edited by topsquark; Sep 4th 2008 at 02:47 AM.

 Sep 3rd 2008, 05:29 PM #3 Junior Member   Join Date: Aug 2008 Location: United States Posts: 24 The link doesn't work.
Sep 4th 2008, 02:48 AM   #4
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 Originally Posted by Rainy2Day The link doesn't work.
Sorry. Try it now.

-Dan
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 Sep 4th 2008, 02:55 AM #5 Junior Member   Join Date: Aug 2008 Location: United States Posts: 24 Thank you!

 Tags addition, problems, subtraction, vector

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