The above mentioned observation leads to a very important
conclusion: gravitational energy (like any other form of
energy) can be transformed into other form (heat energy,
sound energy etc.). But the question arises: Can we convert
effectively weaker gravitational energy into any other form
of usable energy, say, electrical energy? It is certain that for
doing it, what we need to do is the amplification of
gravitational energy prior to its conversion into the desired
form of energy.