Three equal point masses of are placed at the vertices of an equilateral triangle of side

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential

Problem

Three equal point masses of

2\,\text{kg}

are placed at the vertices of an equilateral triangle of side

0.30\,\text{m}

. What is the magnitude of the gravitational field at the centre of the triangle? (a)

1.3\times10^{-8}\,\text{N kg}^{-1}

(b)

7.7\times10^{-9}\,\text{N kg}^{-1}

(c)

0\,\text{N kg}^{-1}

(d)

4.5\times10^{-9}\,\text{N kg}^{-1}