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Rockets − principle
A rocket is a vehicle which propels itself by ejecting a
part of its mass. Rockets are used to carry the payloads
(satellites). We have heard of the PSLV and GSLV rockets.
All of them are based on Newton's third law of motion.
Consider a hollow cylindrical vessel closed on both
ends with a small hole at one end, containing a mixture of
combustible fuels (Fig. 4.14). If the fuel is ignited, it is
converted into a gas under high pressure. This high pressure
pushes the gas through the hole with an enormous force.
This force represents the action A. Hence an opposite force,
which is the reaction R, will act on the vessel and make it
to move forward.
The force (Fm) on the escaping mass of gases and
hence the rocket is proportional to the product of the mass
of the gases discharged per unit time (dm/dt) and the velocity
with which they are expelled (v)
(i.e) Fm α (dm/dt)v i.e [F= d/dt (mv) ]
This force is known as momentum thrust. If the
pressure (Pe) of the escaping gases differs from the pressure
(Po) in the region outside the rocket, there is an additional thrust called
the velocity thrust (Fv) acts. It is given by Fv = A (Pe − Po) where A is the
area of the nozzle through which the gases escape. Hence, the total
thrust on the rocket is F = Fm + Fv
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Does a rocket works on principle of conservation of mass?
No
What is harder than rocket science?
Quantum Mechanics... Rocket science is actually easy in principle...
What is the different between missile and rocket?
A missile is a rocket that has a guidance system that can steer the vehicle after launched. A rocket has none such system; basicaly, point-and-launch.
Principle on which a rocket works?
Technically it doesn't "fly", but is propelled by thrust. Unlike an jet, propeller aircraft or helicopter, the rocket has no wings to produce lift. Think of it like a balloon you have just inflated, but you are holding the end closed with your fingers. Now release that balloon and it will appear to fly around the room until the thrust from the escaping air is depleted. A rocket produces thrust by burning fuels, not pressurized air - except the rocket has a sophisticated guidance system, which keeps it on course (as apposed to shooting all over the place like a balloon.) So, a rocket is propelled by burning fuels (commonly liquid hydrogen and oxygen) which produce thrust. The rocket's thrust output is modified via manipulation of both thrust output and altering the direction of the control thrusters. And hence, it appears to fly.
What is a device that is driven forward by a powerful stream of hot gas?
A Rocket
What makes a Rocket Shoot From the Rocket Launcher?
A fundamental principle of Newtonian Physics states that for every action, there is an equal and opposite reaction. The rocket blasts an incredible amount of energy through it's nozzle, this creates a reactive force in the opposite direction that pushes against the rocket and launches from the rocket launcher.
What is the same between aircraft and spacecraft?
Both use the same principle for flying. But an aircraft normally doesn't use a rocket. Spacecrafts use rocket engines.
Is rocket engineering related to physics?
Yes.
Does a rocket works on principle of conservation of mass?
No
What is the principle behind the working of a Rocket?
the principle behind working of a rocket is newtons 3rd law of motion which states that every action has equal and opposite reaction
What is harder than rocket science?
Quantum Mechanics... Rocket science is actually easy in principle...
What is the relationship between income and luxury goods?
higher income, more luxery goods. not rocket science.
What is the difference between a long rocket fin and a short rocket fin?
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.
Physics Help on a rocket problem please?
so what is the problem???
The achievement of lifting a rocket off the ground and into space can be explained by?
Physics.
What classes do you have to take to be a rocket scientist?
physics,chemistry , and computer scientist
What was Konstantin Tsiolkovsky's most significant contribution?
Tsiolkovsky devised the Tsiolkovsky rocket equation, or ideal rocket equation, which describes the motion of vehicles that follow the basic principle of a rocket.
