Consider two particles of masses m1 and m2. The position of the first particle is fixed, and the distance between the particles is a units. Using Newton’s Law of Universal Gravitation, find the work needed to move the second particle so that the distance between the particles increases to b units.

Consider two particles of masses m1 and m2. The position of the first particle is fixed, and the distance between the particles is a units. Using Newton’s Law of Universal Gravitation, find the work needed to move the second particle so that the distance between the particles increases to b units.