Physics

Problem

Three point masses

m_A=2\,\text{kg}

m_B=3\,\text{kg}

and

m_C=4\,\text{kg}

are placed at the vertices A, B and C respectively of an equilateral triangle of side

0.40\,\text{m}

. a. (i) Draw a clear vector diagram showing the gravitational forces acting on mass

m_A

due to masses

m_B

and

m_C

. b. (ii) Calculate the magnitude and direction of the net gravitational force on the mass

m_A

. Express the direction as an angle with respect to side AB. c. (iii) Determine the magnitude of the gravitational field intensity at the centroid of the triangle due to all three masses together.

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