Three forces P, Q, R act along the sides...

Three forces P, Q, R act along the sides BC, AC and BA of an equilateral triangle. If their resultant is a force parallel to BC through the centroid of the triangle, prove that
`Q=R=P//2`

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Three forces P, Q, R act along the sides BC, AC and BA of an equilateral triangle. If their resultant is a force parallel to BC through the centroid of the triangle, prove that `Q=R=P//2`

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Three forces P, Q, R act along the sides BC, AC and BA of an equilateral triangle. If their resultant is a force parallel to BC through the centroid of the triangle, prove that
`Q=R=P//2`