Where Is the Center of Mass in a Triangle with Unequal Masses?

[TutaTeacherAllan]

Homework Statement

Figure 4 shows three point masses glued to the vertices of a massless triangle of side L=2.0 m. Two of the massess are m=0.75kg and the other mass is twice that value, as shown in the figure. The device is allowed to rotate about point A in a verticle plane about the centre of the larger mass, 2m. Give the x and y coordinates of the centre of mass of the device in the coordinate system

Relevant Equations

Figure 4 shows three point masses glued to the vertices of a massless triangle of side L=2.0 m. Two of the massess are m=0.75kg and the other mass is twice that value, as shown in the figure. The device is allowed to rotate about point A in a verticle plane about the centre of the larger mass, 2m. Give the x and y coordinates of the centre of mass of the device in the coordinate system

Figure 4 shows three point masses glued to the vertices of a massless triangle of side L=2.0 m. Two of the massess are m=0.75kg and the other mass is twice that value, as shown in the figure. The device is allowed to rotate about point A in a vertical plane about the centre of the larger mass, 2m. Give the x and y coordinates of the centre of mass of the device in the coordinate system

 

[haruspex]

"Relevant equations" is for standard equations you think may be relevant to the problem, not a rehash of the question.

Please post an attempt as required by forum rules.

 

[TutaTeacherAllan]

I have no Idea how to start please

 

[haruspex]

I have no Idea how to start please

What have you been taught about finding a centre of mass?

 

[Lnewqban]

I have no Idea how to start please

Welcome, Allan!
Not using any equation yet:
If the values of the three masses were all the same, let's say 1 kg each, where the center of mass would be located at within the triangle?
Question a) is asking you about the x-y location of the center of mass before the triangle is rotated 45 degrees.

Please, see:
http://hyperphysics.phy-astr.gsu.edu/hbase/cm.html

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