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# Mechanics 2 Help!!! watch

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Thank you very much.
2. (Original post by superkillball)
Thank you very much.
Is the figure a wire-frame or a solid figure.
and is that length = 60 cm?
What are the other dimensions?

Edit: ok, got the other dimensions.

Edit²: it's the figure 3.2 that you want the com for!
3. For the lamina, I get centre of mass is at (12.526, 10.368), and for the wire, it's (14.595, 9.757).
4. taking moments about O: (m is the weight/unit length)

horizontally:

2*4m + 4*6m + 14*20m + 24*20m + 12*24m = x*74m

=> x = 14.59 = 14.6cm

vertically:

6*4m + 3*6m + 0*20m + 10*20m + 20*24m = y*74m

=> y = 9.76cm

=> COM = (14.59,9.76)
5. thank you very much

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