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    any help with this please? I thought i got it but for a i got 10.5a and online solutions got something else (Arsey)
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    (Original post by mattvm)


    any help with this please? I thought i got it but for a i got 10.5a and online solutions got something else (Arsey)
    Tell me your numbers for areas and your equation and I'll look for the error.

    Your answer puts the C of M above the top of the triangle!
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    (Original post by tiny hobbit)
    Tell me your numbers for areas and your equation and I'll look for the error.

    Your answer puts the C of M above the top of the triangle!
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    (Original post by mattvm)
    Two things:

    The C of M of a triangular lamina is 1/3 of the way up, not 1/2 way up.

    You need to subtract the second part of your equation since the "white" triangle isn't there (or to look at it another way, white triangle + the actual lamina = the big triangle)
 
 
 
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