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# M2 centre of mass question watch

1. Hi, im doing some m2 work on centre of mass and im confused about methods, on a video of exam solutions, in 2 videos there is both a triangle and a rectangle and both ask you to find the centre of mass, but the method he used on the first video does not work with the second video is there any reason why? this is the link for the first vid https://www.youtube.com/watch?v=GtNY...HhCDQ&index=23 and this is the second one https://www.youtube.com/watch?v=wInb...koXKRhsUWHhCDQ any help would be appreciated
2. (Original post by uchihaitachi0023)
Hi, im doing some m2 work on centre of mass and im confused about methods, on a video of exam solutions, in 2 videos there is both a triangle and a rectangle and both ask you to find the centre of mass, but the method he used on the first video does not work with the second video is there any reason why? this is the link for the first vid https://www.youtube.com/watch?v=GtNY...HhCDQ&index=23 and this is the second one https://www.youtube.com/watch?v=wInb...koXKRhsUWHhCDQ any help would be appreciated
The first is a lamina and the second is a wire framework. You may need to look at a textbook/watch a video if you don't know the difference and how to approach COM questions for each.

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Updated: October 15, 2017
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