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# M1 question on moments watch

1. https://3b0a7b1bc87f5381e60f8f717510...%20Edexcel.pdf

for 6c)of this question,how do you work out k? Please give simple explanation only as it will confuse me even more. Thanks
2. Try to provide what you have attempted. There is a weight where the string at b is under zero tension. This is the maximum value of k. Any k lower than this will mean that both strings are taking some weight rather than the rod pivoting about c.
3. (Original post by nerak99)
Try to provide what you have attempted. There is a weight where the string at b is under zero tension. This is the maximum value of k. Any k lower than this will mean that both strings are taking some weight rather than the rod pivoting about c.
HI, this is what I did. Please could you show me a diagram for the explanation? Thanks.

4. Your diagram is fine although I would have neglected using 'N' in the labels as I think that the N confuses things as it looks like a variable.

My calculation is different though You have put kW i the wrong direction (as you are equating CW and ACW moments, the moment at D is CW).

Once you have done this we can see that is zero when
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