Two small balls, each of mass m are plac...

Two small balls, each of mass m are placed on a smooth table, connected with a light string of length `2l`, as shown in the figure. The midpoint of the string is pulled along y direction by applying a constant force F. Find the relative speed of the two particles when they are about to collide. If the two masses collide and stick to each other, how much kinetic energy is lost.

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The correct Answer is:

`2 sqrt((Fl)/(m));Fl`

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