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# M2 June 2014 Q3 Help Needed watch

1. Could someone possibly explain how to do question 3 in this paper please?
This was our second lesson on Centre of Mass.

This is a link to Arsey's model answers but I still don't get it, or understand where to start.

http://www.thestudentroom.co.uk/show....php?t=2721238

2. (Original post by Mutleybm1996)
Could someone possibly explain how to do question 3 in this paper please?
This was our second lesson on Centre of Mass.

This is a link to Arsey's model answers but I still don't get it, or understand where to start.

http://www.thestudentroom.co.uk/show....php?t=2721238

The Cof M of a triangular lamina is 1/3 of the way up the median.

You need to do (area of big triangle x its Cof M) - (area of little triangle x its C of M) = (actual area of lamina x the answer you are after).

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