How Rockets Work | I Didn’t Know That

of all the different methods of
propulsion invented by mankind for pure
unadulterated heart-stopping excitement
nothing really compares to rockets
okay I am about to initiate the launch
sequence now stand right back and
witness the explosive power of rocketry
and I think we’re gonna need bigger
rockets don’t you well boys how about
the biggest rocket of all time
imagine 50 jumbo jets at full power
strapped to a 36 storey building that’s
Saturn 5 it takes something like this to
catapult man to the moon but where does
the colossal thrust actually come from
inside a rocket motor fuel is turned
into gas through combustion and the gas
is then forced out the back and the
reason why escaping gas pushes a rocket
forward is explained by Newton’s third
law of motion which is as I’m sure
you’ll remember from school that every
action has an equal and opposite
reaction that’s the theory but what we
need is a practical demonstration now as
Johnny opens the valve on this
pressurized gas canister the air will
rush out but at the same time an equal
and opposite force will propel it this
way gone Johnny open it up there you
have it the basics of rocketry what did
you expect it’s not rocket science
the Rockets launch of speeds does not
depend on the astronaut flooring the
throttle but on how quickly the gas
escapes from the exhaust
space rocket exhaust are
hourglass-shaped because gas blaze at an
accelerated rate if it’s forced through
a narrow section into a wider end the
exhaust is crucial no matter what the
size of the rocket