Two point masses and are placed apart on a straight line

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

Two point masses

6\,\text{kg}

and

3\,\text{kg}

are placed

60\,\text{cm}

apart on a straight line. Calculate the gravitational potential at a point on the line that is

20\,\text{cm}

from the

6\,\text{kg}

mass and lies between the two masses. Take

G=6.67\times10^{-11}\,\text{N\,m}^2\,\text{kg}^{-2}

. (a)

+2.5\times10^{-9}\,\text{J\,kg}^{-1}

(b)

-1.5\times10^{-9}\,\text{J\,kg}^{-1}

(c)

-2.5\times10^{-9}\,\text{J\,kg}^{-1}

(d)

-1.1\times10^{-8}\,\text{J\,kg}^{-1}