Rocket and its working principles
Newton`s law
When I was a child, it was always a big question for me that
how these rockets lift off, I was very amazed when I saw them on the screens. I
have thought that there would be extraordinary principles involved in them and
only few can understand. Yes they are amazing, not only in childhood days but
even in the present days and things about rockets always kept me interested
towards them but the laws involved in them are really simple and most useful.
If we look at them,
It`s the Newton`s third law of motion, which they use them for rocket lift
off. The law says that
For every
action there is an equal and opposite reaction.
Which means that if we apply some force on a body, then
that body will apply an equal force on us but in opposite direction. Actually
this law was derived from momentum conservation principle. The momentum of the
system remains same until an external force is applied on it. If we are ok with this
then how we are going to use this principle in lifting a rocket, what`s the big
link in newton`s third law and rocket lift off.
If we ask a boy to sketch a
rocket on a paper, he generally draws a rough outline of rocket and he never
forgot to keep something (sort of fire) coming out from lower end of it, though
he doesn`t know why that fire is coming out. It is that fire which is solely
responsible for the rocket lift off.
A rocket, when
releases a lot of mass in any form meant that, it is applying some force on that
mass to come out, and from newton`s law, that mass also applies the same force
on the rocket in the opposite direction and if that force can dominate the
earth`s gravitational pull, then we are succeeded, our rocket lifts off from
the earth.
I said am amazed, not only in the
childhood days but also in the present days with the case of rockets where the
force produced by small particles of gases can dominate the force produced by
the gravitational pull of the heavenly body EARTH…
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