Rocket Definition and 1000 Threads

Homework Statement The Lower Machiavellian Space Shuttle, having a total mass of 3500kg, is about to make its' debut launch. Rather then using a rocket engine to launch the shuttle, the Machiavellianans' use a large compressed spring, having a spring constant of 1600N/m. If the spring can be...

Hey, I've been having trouble with the following question, and I've tried all I can think of and still can't get it. Your help is much appreciated. "A rocket with a total mass of 3700kg is traveling in outer space with a velocity of 110m/s towards the sun. It wishes to alter its course by...

I'm troubled by the problem of pumping fuel to a combustion chamber. The big problem is that pressure cannot be directed in some particular direction. So when you see propellant leaving the chamber with a great pressure, it should be kept in mind that the propellant is attempting to leak, with...

Homework Statement A 1000kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 16s, then the motor stops. The rocket altitude 20s after launch is 5100m. There is no air resistance. Questions: What was the rocket's acceleration during the...

Homework Statement Some plane is flying at an altitude of 12.0 km above sea level and is flying in a straight line at 850km/h. The plane then drops a rocket. After the drop the plane maintains the same altitude and speed and continues to fly in a straight line. The rocket falls for a brief...

when there is nothing for the reaction force to push on? My textbook says, ironically rockets work better in space because in atmosphere it has to do work against the pressure thingy. But it doesn't explain why, all it says is "at the microscopic level its complicated" I remember asking...

ok I know that nothing with mass can travel at c but i have to ask this question. if I am in a rocket ship traveling at .5c and another rocket ship is traveling at .5c in the opposite direction then am I traveling at c relative to him . Probably Galilean transformations don’t work in this...

Howdie. This may not be the forum for this, but I am having trouble finding a forum on rocket science. Specifically, it is easy to find various equations for rocket chamber and nozzle design, but they all leave out the crucial equations that relate parabolic nozzle, divergent section...

Hi, just found these forums, and they look very useful. I'm a second year Aerospace Engineering student, and as part of a project I'm modelling the first stage of a Saturn V rocket. I'm using a linear and non-linear model, and have all the equations sorted out. The only problem is I can't...

Hi All Hope this is the right forum, I am looking for an applied approach! I am interested in modelling the behaviour of CO2 powered rocket cars. These small models are powered by releasing pressurised carbon dioxide from a “sparklet” cylinder. The model cars race along 24 metre long...

In http://arxiv.org/abs/0908.1803v1" , 2003, Robert Frisbee offers some ideas on the design of an antimatter rocket. Crane and Westmoreland concentrate more on the possibility of a black hole starship, rather than the size or shape of the craft. I'm wondering, how many of the constraints that...

Not sure if it's chemistry or physics, but the latter seems more like it. Let's take a look at pretty much any large rocket with smoke-less exhaust during it's launch, for example the recent one: As you can see, there are a kind of beads in the exhaust plume at seemingly constant...

Hi there I'm having a bit trouble understanding the rocket motion and how the find the velocity, acceleration and travelheight as a function of time. First, i assume that the velocity of the ejected mass relative to the rocket is constant. Secondly, i assume that the rocket mass changes with...

Homework Statement A Saturn V rocket has a mass of 2.75x10^6 Kg and exerts a force of 3.3x10^6N on the gases it expels. determine the initial vertical acceleration of the rocket. 2. The attempt at a solution heres my attempt... F=3.3x10^6N Fg= M=2.75x10^6 Fnet-MA F-Fg=ma F-mg=ma...

[b]1. A model rocket with a mass of 4.3kg is launched straight up at a speed of 65m/s. Kinetic energy when it takes off is 9083.75 J. Total energy when it takes off is also 9083.75J. When the rocket reaches its maximum height, what is its kinetic energy? [b]2. KE(kinetic energy)=1/2MV^2...

Homework Statement Ok so i had all of this typed up and some work typed out and then the page refreshed and i lost it all so this one is going to be shorter and more brief. I have to create a spreadsheet and graph of altitude vs time and speed vs altitude. My goal is to place a rocket into a...

Homework Statement A rocket is launched straight up from the Earth's surface at a speed of 1.60×10^4 m/s. What is its speed when it is very far away from the earth? Homework Equations F= (GMm)/r^2 G= 6.67 X 10^-11 M= 5.98 X 10^24 Potential Energy = (Gm1m2)/r Kinetic Energy =...

Homework Statement We're currently studying Momentum & Collisions and Work and Energy Use algebra – no Calculus I’d appreciate help in setting it up. I seem to be missing one equation since I keep coming up with two unknown variables. A water rocket (2-liter half filled with water...

Question reads: A rocket of mass 1000 kg is being fired to a height of 5000m. The rocket engine shuts off when the rocket reaches a height of 1000m, and the rocket coasts up to 5000m. a) what velocity must the rocket have at the 1000m point to enable it to reach 5000m ? b) what acceleraation...

Ok so What i am thinking of doing is testing the thrust of my rocket, I am thinking of doing it this way. I will have the rocket at one end of a rotating Planck and at the other end some counter balance. I will then fire the rocket of will its in the rest position, then when it is done...

Homework Statement Prove that the upward velocity of a rocket of initial mass M0, which is propelled by fuel burning at a rate of R kg/s, is given by vy = uex * ln[M0 / M(t) ] - g * t. uex is the speed of the exhaust gas relative to the rocket and M0 is the initial mass (rocket + fuel). Also...

This is actually a problem in Goldstein. Homework Statement A rocket that ejects stuff at a speed a in its rest frame. Demonstrate that m\frac{d v}{dm} + a\left(1 - {v^2 \over c^2}\right) = 0 in which m is the invariant mass of the rocket and v is the velocity of the rocket viewed in Earth...

As part of a daring rescue attempt, the Millennium Eagle passes between a pair of twin asteroids, as shown . If the mass of the spaceship is 2.50 *10^7 kg and the mass of each asteroid is 4.49×10^11 kg A picture is shown here...

Homework Statement A small rocket of mass 1ton is moving horizontally with a velocity of 600 m/s in the x direction.The total force on the rocket is zero.10 kg of jet gas is ejected at a velocity (in the x direction) of -6000 m/s with respect to the ground.The ejection takes place over a...

Homework Statement A Rocket is propelled as a result of the very rapid ejection of exhaust gas from the rear of the rocket. Given that the initial mass of the rocket and fuel is 5000kg and the 4000kg of fuel is burned in accelerating the rocket to a speed of 600m/s, calculate the speed of...

Homework Statement A rocket moves upward, starting from rest with an acceleration of 32.2 m/s2 for 5.84 s. It runs out of fuel at the end of the 5.84 s but does not stop. How high does it rise above the ground? Homework Equations I do not know. All equations I have tried have been...

Homework Statement A rocket launched at 70 degrees to the horizontal has a constant net acceleration of 8m/s^2 along this direction for 6.5s and then is in free-fall. Find: (a) the maximum height; (b) the horizontal range. Homework Equations Kinematics equations (along x and y)...

Homework Statement Calculate the force exerted on a rocket, given that the propelling gases are expelled at a rate of 1000 kg/s with a speed of 60,000 m/s (at takeoff) Homework Equations p=mv F\Delta{t} = \Delta{p} The Attempt at a Solution This is probably the first question I am...

Homework Statement Obviously, we can make rockets to go very fast, but what is a reasonable top speed? Assume that a rocket is fired from rest at a space station in deep space, where gravity is negligible. If the rocket ejects gas at a relative speed of 1100 and you want the rocket's...

Homework Statement A rocket is fired straight up from the surface of the Earth at half the escape velocity. How high will it go relative to the surface of the earth? Neglect dissipative forces. Homework Equations Uinitial + Kinitial = Uf Kf is zero G*m*M/radius^2 + 1/2mv^2 =...

The Basis of this question is that: * Rockets launched at an angle follow the path of a rectangular hyperbola when thrust greater than their mass is produced. * That rockets fall in the path of a parabola when thrust is no longer produced, this only applies when the rocket has both x and y...

A model rocket is launched with an upward acceleration, after t seconds it runs out of fuel at x height. Sketch the a vs. t, v vs. t, and position vs. t graphs for the rocket from the time of launch until the moment it reaches max height. -I know that after the rocket runs out of fuel it will...

About stabilizing a space rocket using a pendullum There exists a competition called Google Lunar X Prize whose main objective is sending a rocket to the Moon. One of the contenders, team ARCA, is ready to launch a rocket (not a Moon rocket) about which they claim to be passively stabilized...

This is my first posting - I don't know whether its on the right section but I have a question is there a formula to work out how much thrust you need to get a certain weight of rocket up in the air, also for the rockets altitude? Thanks

Homework Statement A rocket car is developed to break the land speed record along a salt flat in Utah. However, the safety of the driver must be considered, so the acceleration of the car must not exceed 5g (or five times the acceleration of gravity) during the test. Using the latest materials...

I don't know if I posted on the right forum but I know I'm on the right site. I'm planning to create my first homemade rocket that can fly maybe hundreds of feet or less then it will parachute down after peacefully. I'm not an engineer but if you willing to help me, I would feel how to...

Could you please help me find experimental error in bottle rocket experiment that could have affected my results. The experiment is where a bottle gets filled with water, a third of their volume and then they get pressurized to fly in the air. So could you please find me experimental errors...

Homework Statement A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 76.0 m/s2 for 1.54 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground)...

Homework Statement A two stage rocket is launched with an average acceleration of +4 m/s/s. After 10 seconds, a second stage is activated and the rocket's acceration is now +6 m/s/s. Part A: Find the vertical displacement of stage one of the rocket, before accleration changes to 6...

Homework Statement A two stage rocket is launched with an average acceleration of +4 m/s/s. After 10 seconds, a second stage is activated and the rocket's acceration is now +6 m/s/s. Part A: Find the vertical displacement of stage one of the rocket, before accleration changes to 6...

Homework Statement To illustrate the use of a multistage rocket consider the following: (a) A certain rocket carries 60% of its initial mass as fuel. (That is, the mass of fuel is .6m0). What is the rocket's final speed, accelerating from rest in free space, if it burns all its fuel in...

Homework Statement A rocket (initial mass m0) needs to use its engines ot hover stationary, just above the ground. If it can afford to burn no more than a mass (lamda)m0 of its fuel, for how long can it hover? If the exhaust velocity is 3000 m/s and lambda is 10% how long can the rocket...

Homework Statement A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 60.5° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 22.5 m away. The rocket attains its launch speed in a negligibly short period of time, after which its...

One idea that just came to me relates to the "pendulum fallacy", whereby people mistakenly think that a rocket is hanging by the nose from an imaginary string, instead of actually resting on top of its tail/thruster. So then, what if you could position a lot more of the rocket/lander's mass...

A rocket is fired vertically upwards with an initial velocity of 80 m/s with an acceleration of 4 m/ss until it reaches an altitude of 1000m. At that point it goes into free fall (a= -9.8) What time interval is the rocket in the air? What is its maximum altitude? What is its velocity...

Kinematics Model Rocket problem ! A) A model rocket is launched straight upward with an initial speed of 49.6 m/s. It accelerates with a constant upward acceleration of 1.83 m/s2 until its engines stop at an altitude of 155 m. What is the maximum height reached by the rocket? B) How long...

Homework Statement A rocket is launched at an angle of 53 degrees above the horizontal with an initial speed of 100 m/s. The rocket moves for 3.00s along its initial line of motion with an acceleration of 30.0 meters per second squared. At this time, its egines fail and the rocket proceeds to...

Homework Statement A rocket, initially at rest on the ground, accelerates straight upward from rest with constant net acceleration a, until time t1, when the fuel is exhausted. Find the maximum height H that the rocket reaches (neglecting air resistance). Express the maximum height in...

can someone please help me?? I thought I had the answer to this problem, but it doesn't match the book's answer. I can't figure out what I'm doing wrong. This is the problem: A rocket is launched straight up with constant acceleration. 4 seconds after liftoff, a bolt falls off the rocket and...

Homework Statement A model rocket has been fired with V0=50m/s at 35 degrees above horizontal. Find magnitude and direction at t=4s. Homework Equations V = V0+at, displacement = v0t + .5at2 The Attempt at a Solution I have successfully found the magnitude by setting Vx= 50*cos35...