[lekha2611]

Help with Q4b,6c and 7 please! I have tried but failed
(I'll uploaded my attempt at question 7)

[Phredd]

Just taking a look at your anser for q7, it looks like you have resolved the forces incorrectly

At the top:

[ghostwalker]

For Q7.

Your re-arrangement to get (4) (I think it's 4; difficult to read), is incorrect in the last couple of lines, and should be



Then when you sub (3) into (4), there is no need to square the brackets, as you're substituting for , not .

[lekha2611]

(Original post by Phredd)
Just taking a look at your anser for q7, it looks like you have resolved the forces incorrectly

At the top:

(Original post by ghostwalker)
For Q7.

Your re-arrangement to get (4) (I think it's 4; difficult to read), is incorrect in the last couple of lines, and should be



Then when you sub (3) into (4), there is no need to square the brackets, as you're substituting for , not .

Thank you for spotting that for me! I'll try that question (7) again then, thank you!

[lekha2611]

(Original post by Phredd)
Just taking a look at your anser for q7, it looks like you have resolved the forces incorrectly

At the top:

Looking back at this, when you resolve downwards, the weight would be added to the tension surely? Tension would be acting toward the centre of the system as well as the weight, which acts vertically as well?