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February 12 Information
I figured out the resultant force from the three component forces at [1] but part B stumps me. It seems obvious to me that the answer should be the 2.45, but that's marked wrong when I entered it in part b. What else could the answer be? Imagine Reason ( talk) 12:57, 12 February 2018 (UTC)
![[1]](https://i.imgur.com/7LqYUIs.jpg){kind=link}
- The problem seems poorly worded since it says "to be added" without saying what it's to be added to. So are you sure that T is meant to be added to R? Also, without seeing the whole problem it's hard to know if the value of R is correct; you're implying that the it was scored as correct but erroneous answer keys have been known. As a general principle, if u and v are perpendicular, then the value of t which minimizes |u+v+tu| is -1. -- RDBury ( talk) 16:20, 12 February 2018 (UTC)
| Mathematics desk | ||
|---|---|---|
| < February 11 | << Jan | February | Mar >> | Current desk > |
| Welcome to the Wikipedia Mathematics Reference Desk Archives |
|---|
| The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
February 12 Information
I figured out the resultant force from the three component forces at [1] but part B stumps me. It seems obvious to me that the answer should be the 2.45, but that's marked wrong when I entered it in part b. What else could the answer be? Imagine Reason ( talk) 12:57, 12 February 2018 (UTC)
- The problem seems poorly worded since it says "to be added" without saying what it's to be added to. So are you sure that T is meant to be added to R? Also, without seeing the whole problem it's hard to know if the value of R is correct; you're implying that the it was scored as correct but erroneous answer keys have been known. As a general principle, if u and v are perpendicular, then the value of t which minimizes |u+v+tu| is -1. -- RDBury ( talk) 16:20, 12 February 2018 (UTC)