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10 cards from this deck
Point where total weight of system effectively acts
Weighted average position of all masses
M=โi=1nmiM = \sum_{i=1}^{n} m_iM=โi=1nโmiโ
xห=โmixiโmi\bar{x} = \frac{\sum m_i x_i}{\sum m_i}xห=โmiโโmiโxiโโ
x-coordinate xห\bar{x}xห
y-coordinate yห\bar{y}yหโ
yห=โmiyiโmi\bar{y} = \frac{\sum m_i y_i}{\sum m_i}yหโ=โmiโโmiโyiโโ
Suspension point to centre of mass line is vertical
Create couple causing rotation
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