Finding the Equation of c in a Moving Wedge with a Particle

[athrun200]

Homework Statement

See Q2, Method 1 part c.

Homework Equations

The Attempt at a Solution

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I have obtain all eqtn I need but I cannot figure out how to get the equation of c.
I have been trying for few days and my friends tell me that it is possible that Dr made a mistake. Since without part c, we can still do part d easily.

Can anyone help me to see weather there are any error in the question?

 

[Doc Al]

Your attachment doesn't seem to have Q2 in it.

 

[athrun200]

I have fixed the problem now

 

[Doc Al]

My only comment is that your equation for the wedge neglects the tension in the string.

 

[athrun200]

Thx very much!