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Find the PE of three objects of masses ...

Find the PE of three objects of masses 1 kg, 2 kg and 3 kg placed at the three vertices of an equilateral triangle of side 20 cm.

A

50 G J

B

`-55 G` J

C

5 G J

D

60 G J

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The correct Answer is:
B
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Find the position of centre of mass of the system of 3 objects of masses 1 kg, 2kg and 3 kg located at the corner of an equilateral triangle of side 1 m. Take 1 kg mass object at the origin and 2kg along x-axis.

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