Q. 7

Two small bodies of masses 10 kg and 20 kg are kept a distance of 1.0 m apart and released. Assuming that only mutual gravitational forces are acting, find the speed of particles when the separation decreases to 0.5 m.

Answer :

The mass of bodies is and .

Initial separation,

Final separation,

Initial velocity, ,

Let the final velocity be , .

From momentum conservation

Here, we will apply the conservation of energy,


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