Aperfectly flexible cable has length l, and initially it is at rest with a length xo of it hanging over the table edge. neglecting friction, compute the length hanging over the table edge after an elapsed time t, assuming cable sections remain straight during the subsequent motion.

Explanation:

Given that

Length = L

At initial over hanging length = Xo

Lets take the length =X after time t

The velocity of length will become V

Now by energy conservation

So

We know that

At t= 0 ,X=Xo

So we can say that

So the length of cable after time t

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.