Please read about center-of-mass in the online lecture notes (under Ch.9 Linear momentum) to prepare for this problem. Place the origin, O, at the...

Please read about center-of-mass in the online lecture notes (under Ch.9 Linear momentum) to prepare for this problem. Place the origin, O, at the lower left. If the positive y-axis points up along the page, what is the y coordinate of the center of mass in terms of a? That is, the answer is a number times a; what is the number? http://www.learning.physics.dal.ca/d...treOfMass4.gif