Physics Help Forum Forces in vectors Calculation

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 Dec 8th 2018, 03:10 PM #1 Junior Member   Join Date: Dec 2018 Posts: 2 Forces in vectors Calculation Hi please refer to the image for the question. Attached Thumbnails
Dec 10th 2018, 07:23 AM   #2
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 Originally Posted by KyleFresh Hi please refer to the image for the question.
So... what do you think?

Do you know what the difference is between $\displaystyle v$, $\displaystyle v_x$ and $\displaystyle v_y$?

Yesterday, 01:54 PM   #3
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 Originally Posted by benit13 So... what do you think? Do you know what the difference is between $\displaystyle v$, $\displaystyle v_x$ and $\displaystyle v_y$?
I got Fnetx= vcosθ - cv^2cosθ

Today, 03:00 AM   #4
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 Originally Posted by KyleFresh I got Fnetx= vcosθ - cv^2cosθ
Okay... but do you know what the difference is between $\displaystyle v$, $\displaystyle v_x$ and $\displaystyle v_y$? It's important because once you know that, you're find the question a lot easier.

 Today, 03:53 AM #5 Senior Member     Join Date: Jun 2016 Location: England Posts: 664 There is a standard maths technique for separating a vector into separate components, acting in different directions. (2 components for a 2D vector, 3 for a 3D vector, etc.) By convention these components are at 90 degrees with respect to each other. (It is possible to define and use components that are not at 90 degrees, but that is another story). There are standard mathematical rules for what happens to each component of a vector when a mathematical operation is applied to the main vector. If you are familiar with those rules, then the answer is obvious. If you are not familiar with those rules, seek additional guidance from your tutor. The whole point of your tutor giving you these questions is to identify any holes in your understanding, and if they are a good tutor they will then try to fix those holes. __________________ ~\o/~

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