Rocket Definition and 1000 Threads

Homework Statement A rocket of initial mas M, of which M-m is fuel, burns its fuel at a constant rate in time tau and ejects the exhausts gases with constant speed u. The rocket starts from rest and moves vertically under uniform gravity . Show that the maximum speed achieved by the rocket...

Homework Statement A 1000 kg 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. You can ignore any effects of air resistance. Homework Equations The Attempt at a...

Homework Statement A Roadrunner F45 rocket engine, of mass 93g, is attached to a 2kg cylinder, which glides along a horizontal low friction nylon fishing wire. The thrust curve for the rocket engine is given. In reality, 30g of propellant are burned as the engine is ignited. Calculate the...

Why is the trajectory of a rocket always parabolic if a rocket launches straight up in the air perpendicular to the ground? Doesn't a rocket just drop straight down back to the launch pad? I think the rocket lands away from the launch pad depending on the speed of the rocket.

How do you calculate the period during rocket launch that produces a certain g-force? Is there a formula to work this out?

Hello, I am building a device that tests the maximum thrust of hobby rocket engines, and I need to know if there is any way to get "streaming time." Time that is recorded at certain intervals. Can someone give me a link? Thanks! ~Nick

Hi, I am new to building large candy rockets, and I have a target of building a candy rocket that can reach an altitude of over 40,000ft. I am mostly concerned with the safety when casting such propellants. I am looking at casting over 200 pounds of propellant. Any one got any advice. I have...

Gas core reactor rockets use nuclear gas reacting to super heat and therefore pressurize hydrogen. They operate at about 25000 C. Why not use a high intensity plasma arc which routinely operate at about 13,000 C but if designed to can go much higher by at least several fold. I got bored...

I really enjoy building model rockets, however, I moved oversees and can't get premade engins. Nor can I get potassium nitrate or any other common combustable. What can I do to make a small solid rocket engin??

Homework Statement I'm getting this problem wrong and I'm not quite sure why. The 200 g model rocket shown in the figure generates 4.0 N of thrust. It spins in a horizontal circle at the end of a 100 g rigid rod. What is its angular acceleration (in rad/s2)? Homework Equations...

Homework Statement The figure below shows a two-ended "rocket" that is initially stationary on a frictionless floor, with its center at the origin of an x axis. The rocket consists of a central block C (of mass M = 6.00 kg) and blocks L and R (each of mass m = 2.50 kg) on the left and right...

I'm a sophomore Aerospace major, and I'm also a new member to a rocket student group at my university. We are currently involved in a competition with NASA, and they have asked our group to write a Preliminary Design Review. Everything was split up, and I was left with the rocket's airframe...

Homework Statement a 10.2 kg weather rocket generates a thrust of 200N. the rocket ,pointing upwards, is clamped to the top of a vertical spring, whose spring constant is 500N/m and is anchored to the ground a)initially before the engine is ignited the sits at rest on top of the srping. how...

Homework Statement A 4200-kg rocket is traveling in outer space with a velocity of 120 m/s toward the Sun. It needs to alter its course by 23.0^{}0, which can be done by shooting its rockets briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a...

Homework Statement A model rocket releases its first stage when it is 100.0 m above the ground and moving upward at 40.0 m/s. Ignoring air resistance, find: the time it takes the first stage to hit the ground Homework Equations Y=Yo+VyoT+1/2GT^2 Quadratic The Attempt at a...

Homework Statement Rocket with fuel mass of m(initial) Rocket without fuel is m(final) Time for fuel to be used up is t(final) Homework Equations What is m(t) (slope of m vs t graph) (i assume t(initial) is zero The Attempt at a Solution [((m(final) -m(initial)) / t(final)]t +...

Homework Statement A rocket is launched at an angle of 75 degrees and accelerates at 21.4 m/s^2. Where is the rocket located (from the point of origin) after 11.2 seconds?Homework Equations a=(vf - vi) / t (vf + vi) / 2 = (xf - xi) / t where: vf = velocity final, vi = velocity initial, xf =...

1. Homework Statement Hi, guys. I did a project but questions are killing me right now. I was going all the tutorials but I really have no idea. What we did was water rocket project. Here are the data Ttotal - avg. 9.96 sec. Avg. Apogee - 2.94 sec. 2. Homework Equations 3...

Did the rocket lab in my physics class Shoot a air compressed rocket off of a base that can be angled (though we did not get to angle the rocket) shot it upward and what not. It had 3 different caps (lo, med, hi) and we did each one three times and recorded the data. The problem is I was...

Homework Statement A jet aircraft is traveling at 246 m/s in horizontal flight. The engine takes in air at a rate of 77.0 kg/s and burns fuel at a rate of 4.00 kg/s. If the exhaust gases are ejected at 633 m/s relative to the aircraft, find the thrust of the jet engine and the delivered power...

Homework Statement A 4.00kg model rocket is launched, expelling 63.0g of burned fuel from its exhaust at a speed of 565m/s. What is the velocity of the rocket after the fuel has burned. Hint: Ignore the external forces of gravity and air resistance. Homework Equations Conservation of...

Homework Statement In a military test, a 575 unmanned spy plane is traveling north at an altitude of 2700 and a speed of 450 . It is intercepted by a 1280 rocket traveling east at 725 . If the rocket and the spy plane become enmeshed in a tangled mess, where, relative to the point of...

1. Small rockets are sued to make small adjustments in the speed of satellites. One such rocket has a thrust of 59N. If it is fired to change the velocity of a(n) 74000kg spacecraft by 54cm/s, howl ong should it be fired? Answer in units of s. 2. F=deltaP, delta t; F=mVf-mVi...

Suppose that I want to launch a rocket and want to construct a position-time function for the rocket so that I know where it will be at any given time t. To make this realistic, say mass varies with time, so as the rocket burns fuel it becomes lighter. Suppose the rocket, burning fuel at a...

Homework Statement I need to find the maximum distance a rocket (which is actually a bottle filled with compressed air to 654kPa) can travel when the exhuast nozzle is 22cm (and can be changed to any smaller size if needed). Neglect air resistance. The bottles original mass is 50g...

Can I do a rocket problem with changing M without involving an integral? I am currently taking Calculus 1 and have not learned that yet, although derivatives are no problem. The Problem: 2 parts 1st part: find the max V when fuel runs out. 2nd part: find the R(range), where the...

recently i came across quesiton: a rocket car movves on str horz track. half of car mass is propellent, during run, propellent consumed at constant rate and ejected at constant nozzle velocity the answer says that force is constant but accel is increasing however i got a major question: by...

Ronson drives a rocket sled from rest m up from a15 degree ramp at an acceleration of 8.0 m/s2. The rocket cuts off at the end of the ramp, which happens to be atthe edge of a 75 m high cliff. He freefalls in his sled until he bounces on a trampoline, which is on a 30.0 m high platform, and...

Homework Statement A two-stage rocket is traveling at 1192.0 m/s with respect to the Earth when the first stage runs out of fuel. Explosive bolts release the first stage and push it backward with a speed of 32.4 m/s relative to the second stage. The first stage is 2.00 times as massive as the...

Hi, I have recently started a Matlab course and I have been given a task to write a simple water rocket simulator using function files and a main script. I really don't know where to start and feel over whelmed tackling such a huge task, not knowing anything about water rockets. I would...

Homework Statement I need to predict how far a rocket will land given: Delta Y = 2.032 (80 in ) - Height it will be shot from. Angle - 35 (degrees) My Average velocity is 23.3 m/s. I need to repeat this for angles 40-60 [Increments of 5] Homework Equations I have these...

Homework Statement a 1000kg weather rocket is launched straight up, the rocket motor provides a constant accerelation for 16s, then the motor stops. the rocket altitude 20s after launch is 5100m you can ignore any effects of air resistance. what is the rocket's acceleration during the first...

Homework Statement We are doing the Rocket lab in my Physics class, we shot rockets with different caps on them [ Low, Med, High ] and recorded the times. I have the time, i need to find Initial velocity and Height given that i have time. I also need to take into consideration air resistance [...

Homework Statement A 380 g model rocket is on a cart that is rolling to the right at a speed of 3.0 m/s. The rocket engine, when it is fired, exerts an 7.5 N thrust on the rocket. Your goal is to have the rocket pass through a small horizontal hoop that is 20 m above the launch point. At what...

SpaceX's Falcon1 Rocket Achieves Orbit! Here's an article on Wired.com with an embedded Youtube video! http://blog.wired.com/wiredscience/2008/09/space-x-did-it.html Woohoo! Let the private space age begin! :cool:

Good evening all, I was wondering if anyone would be able to point me in the right direction to equations in regards to designing a proper combustion chamber for a rocket engine, as well as for the throat/De Laval nozzle as well. I've looked around and I can't seem to find anything that...

Hi, My roommate and I were wondering how much energy is needed to rotate the Earth about an equitorial axis. Just as a fun experiment to get Holland into the sun.

Relativity -- rocket problems Homework Statement Consider two rockets, each of rest length 100 meters. Rocket 1 is at rest in frame S and has its nose at x=0 and its tail at x=+100 meters. Rocket 2 is at rest in frame S’ and has its nose at x’=0 and its tail at x’= -100 meters. Now...

A toy rocket moving vertically upward passes by a 2.2 m high window whose sill is 9.0 m above the ground. The rocket takes 0.14 m/s} to travel the 2.2 m height of the window. What was the launch speed of the rocket? Assume the propellant is burned very quickly at blastoff. How high will...

A model rocket rises with constant acceleration to a height of 4.0 m, at which point its speed is 25.0 m/s. How long does it take for the rocket to reach this height? Ans: t= 0.32s What was the magnitude of the rockets acceleration? Ans a= 78 m/s^2 "Find the height of the rocket 0.20...

Homework Statement A 1000 kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 12 seconds, then the motor stops. The rocket reaches a maximum altitude 36 seconds after motors exhaust all the fuel. You can ignore any effects of air resistance. (It...

I want to get a little into rocketry and i want to know what are the best chemical mixes for solid and liquid state rockets? also i wanted to know if there are such things as super chemicals. I am not sure if i made that up or not or it just a different word but, what i mean are chemicals that...

I heard about the XSpace rocket failing yet again. Rockets are notoriously susceptible to component failure because of the extreme temperatures and vibrations inherent with rockets. So obviously the fewer moving parts the more reliable the system would be and the added benefit of less parts to...

Homework Statement A Rocket is initially at rest on the ground. The rocket flies off in a straight line at an angle 53.1 degrees above the horizontal with a constant acceleration of magnitude \textbf{g}. The engines stop at a time \textbf{T} after launch, after which the rocket is in...

recenty i read the rocket equation, derivation of, however i think i have a slight confusion with signs suppost initially a rocket has mass= M velocity= \overrightarrow{v} then at a time dt later, mass of rocket= M-dM velocity of rocket= \overrightarrow {v} +d\overrightarrow {v} mass of...

Homework Statement A two-ended "rocket" that is initally stationary on a frictionless floor, with its center a the origin of an x axis. The rocket consists of a central block C(of mass M = 6.00kg) and blocks L and R (each of mass m = 2.00kg) on the left and right sides. Small explosions can...

rocket propulsion and "vortexes" Hi I have been reading a little about vortexes of late. ie hurricane shaped formations. and I wondered if such vortexes were deliberately designed into rocket propulsion systems. I have seen no examples of such in standard rockets whether they be powered...

I've never had an interest in rockets, or pretty much anything physics/science related until I took a physics course over the summer, and ever since then I've hardly stopped thinking about it. The question I have is, can you build a wooden rocket that uses water and compressed air to fuel it, if...

I'm over my head and need help for a story I am writing. I would like the science to be correct. I'm not sure I'm even phrasing the problem correctly, but here goes. Suppose a spaceship will travel to a star that appears 10 light years from earth. The spaceship will accelerate at 0.1 g (as...

what is to top speed that this rocket can achieve as seen by a stationary observer? Also if you look at the distance covered by the rocket, let's say 10 ly in its own frame is covered in 5 years... then anyone in the rockets frame has acually gone faster than the speed of light.?right...