The definition of fin on a rocket would be, a thin, protruding piece of metal whose function is to provide aerodynamic stabilization when the rocket is in flight.
A fin on a rocket is a flat surface projecting from the body that helps stabilize the rocket's flight by providing aerodynamic forces to keep it on a desired trajectory. Fins increase stability by creating drag and preventing the rocket from spinning or veering off course during ascent.
A fin on a rocket acts as a stabilizer during flight by providing aerodynamic stability. It does not fit the traditional definition of a simple machine, as it does not perform mechanical work through movement or force multiplication.
fin and tip (cone).
A longer fin has increased aerodynamic drag. The geometric relationship between the drag caused by the fins and the center of gravity of the rocket determine the stability of the rocket in flight. Less aerodynamic drag means the rocket can go higher or farther, but it also means the rocket is less stable in flight. This tradeoff has to be considered in the design of the rocket.
It helps stabilise the flight
yes
There the most aerodynamic of fin shapes.
Possibly to produce stability or a semi-controlled flight (?)
A rocket body tube is the center of a rocket; also the piece that holds the rocket together.
End of Century
Triangle.
A rocket exhaust nozzle that can be aimed in any direction.