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M1 vectors

https://2802a3b1a650824d2586fd3336bd5d5d2d5c2cf8.googledrive.com/host/0B1ZiqBksUHNYdlJ3eXE3ZkJsVkU/12%20Gold%202%20-%20M1%20Edexcel.pdf

How am i supposed to do question 4?
It doesn't give me a diagram and all i know are that it has 3 forces, 1 which isn't given and i have to find and that it's in equilibrium.

I don't know which way any forces are acting so how are you supposed to do this question?
Original post by Big white
https://2802a3b1a650824d2586fd3336bd5d5d2d5c2cf8.googledrive.com/host/0B1ZiqBksUHNYdlJ3eXE3ZkJsVkU/12%20Gold%202%20-%20M1%20Edexcel.pdf

How am i supposed to do question 4?
It doesn't give me a diagram and all i know are that it has 3 forces, 1 which isn't given and i have to find and that it's in equilibrium.

I don't know which way any forces are acting so how are you supposed to do this question?


a) the sum of the i components of all 3 forces equals 0 and the sum of all 3 j components equals 0. So solve for p and q.

b) get the sum of the first 2 forces and use pythagorus with the i and j components to find the magnitude

c) use trig to find the angle of the resultant force you calculated. Make sure you add 90 degrees because you want to find the angle to the positive j axis.

Hope that helps and good luck for tomorrow :smile:

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Big white
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Original post by Themathgeek
a) the sum of the i components of all 3 forces equals 0 and the sum of all 3 j components equals 0. So solve for p and q.

b) get the sum of the first 2 forces and use pythagorus with the i and j components to find the magnitude

c) use trig to find the angle of the resultant force you calculated. Make sure you add 90 degrees because you want to find the angle to the positive j axis.

Hope that helps and good luck for tomorrow :smile:

Posted from TSR Mobile

thanks, good luck for you too
Original post by Big white
thanks, good luck for you too


Thank you :biggrin:

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