Is it possible to create a rocket with a variable blast diameter
to achieve different levels of torque and power similar to a
geared transmission? I suppose the best analogy I have is the
difference in power between a garden hose normally and when you
plug it with your thumb, creating more pressure. Would it be
possible to have a rocket launch with maximum diameter, and
slowly close up like a camera shutter to gain speed once in the
air? Perhaps this shudder would be angled like a funnel to
direct the blast easier. All the rockets I see have a fixed
diameter and it just makes me curious. Experts in the field are
requested to answer via comments How it is possible to double
the momentum of a body by increasing the kinetic energy four
times?at the time what happen to mass? When we say, KE is
increased, we mean to say by increasing speed alone unless
otherwise specified. Here mass remains constant. Please note
that the question says, KE of a body increased 4 times; which
suggests that the body is the same and KE