Question

Two equal masses are attached to the two ends of a spring of spring constant k.The masses are pulled out symmetrically to stretch the spring by a length x over its natural length. The work done by the spring on each mass during the above stretching is

Answer 1

Suppose there are 2 bodies of mass M1 and M2 sepreated by diatance "D".
Left in empty space.

( Note: Here empty space means Outer space)

And there's nothing around them within a radius of a quadrillion Lightyears.

Now these two bodies will attract each other (because of their gravitational forces). Such after some time they'll be touching each other.


Now what you have to do here is calculate that time taken by those two bodies to attract each other.

Answer 2

Hey..

when to body attractive in the form of the energy the mass is variable