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> ## Additional goal - An explanation of the balance theory
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> Physical structure of small robot from exercise 1:
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The robot’s struggle to balance can be due to it’s centre of gravity. As shown in (fig. ?) the robot used for this exercise (placed on the right) has a tall centre of gravity indicated by the horizontal line. We found the centre of gravity by balancing the robots to find their pivot points. Because of this inaccurate method, the centre of gravity might be slightly different if we made the appropriate mathematical calculations, but as the figure only serves as an illustration we found our method adequate.
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The robot’s struggle to balance can be due to it’s centre of gravity. As shown in (fig. 8) the robot used for this exercise (placed on the right) has a tall centre of gravity indicated by the horizontal line. We found the centre of gravity by balancing the robots to find their pivot points. Because of this inaccurate method, the centre of gravity might be slightly different if we made the appropriate mathematical calculations, but as the figure only serves as an illustration we found our method adequate.
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> ![centre-of-gravity-robots (1)](http://gitlab.au.dk/uploads/group-22/lego/3d98c9c591/centre-of-gravity-robots__1_.jpg)
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> ##### Fig. 8 - Lines indicate the centre of gravity
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