Rocket Definition and 1000 Threads

Just wondering. Would appreciate any input! :)

Homework Statement Your school science club has devised a special event for homecoming. You've attached a rocket to the rear of a small car that has been decorated in the blue-and-gold school colors. The rocket provides a constant acceleration for 9s. As the rocket shuts off, a parachute opens...

Homework Statement A person wants to shoot a rocket off of a mountain 3.26 km high so that the rocket, when shot at 31.3° above the horizontal from the very top of the mountain, lands at the foot of the mountain 9.37 km (horizontal distance) away. What initial speed must the rocket have...

Homework Statement A rocket of initial mass m_{0} accelerates from rest in vacuum in the absence of gravity. As it uses up fuel, its mass decreases but its speed increases. For what value of m is its momentum p = mv maximum?Homework Equations Tsiolkovsky rocket equation: v(m) = v_e ln \left(...

Homework Statement A faulty model rocket moves in the xy-plane. The rocket's acceleration has components: a[SIZE="1"]x(t) = 2.5t² and a[SIZE="1"]y(t) = 9 - 1.4t At t= 0, the rocket is at the origin and has velocity V[SIZE="1"]0 = 1i + 7j (a) calculate the velocity and positions vectors as...

Homework Statement A rocket rises vertically, from rest, with an acceleration of 4.0 until it runs out of fuel at an altitude of 1500 . After this point, its acceleration is that of gravity, downward. How long does it take to reach this point? What maximum altitude does the rocket...

Homework Statement Consider the case of a rocket taking off vertically from rest in a gravitational field g. The differential equation is given by m\dot{v} = -\dot{m}v_{ex}-mg Assume the rocket ejects mass at a constant rate, \dot{m}=-k (where k is a positive constant), so that m=m_{0}-kt...

Rocket Problem, please help :) Homework Statement A rocket rises vertically, from rest, with an acceleration of 3.2 m/s^2 until it runs out of fuel at an altitude of 950 meters. After this point, it's acceleration is that of gravity, downward. a) What is the velocity of the rocket when it runs...

1. Problem A launched rocket emitting gas with a speed of 1500 m/sec relative to rocket and with flowrate of 100 kg/sec. If net mass of rocket is 5000 kg, find it's acceleration. 2. Equations F=ma F=d(mv)/dt Conservation of momentum m1u1 + m2u2 = m1v1 + m2v2 3.Attempt Flowrate = 100...

Suppose that you are at the top of a (rigid) rocket which is half a light year tall. If the rocket is accelerating such that your proper acceleration is 1g, What is the proper acceleration at the bottom of the rocket? B = F c2 c2
F : This is one of the equations given: alpha...

Homework Statement A rocket is launched at an angle of 53 above the horizontal with an initial speed of 100 m/s. It moves along its initial line of motion with an acceleration of 30 m/s^2 for 3 s. A this time its engines fail and the rocket proceeds to move as a free body. a. Find maximum...

Homework Statement A rocket is launched at an angle of 53 degrees above the horizontal with an intial speed of 100 m/s. It moves along its initial line of motion with an accel. of 30 m/s^2 for 3 s. At this time its engines fail and the rocket proceeds to move as a free body. Find the maximum...

I wanted to get some opinions on this, I am serious considering designing a ramjet rocket hybrid engine for my 3rd year mechanical engineering degree project and have started doing the research to see exactly how much work it entails I still can't quite decide... is this a realistic project? (my...

Homework Statement A toy rocket moving vertically upward passes by a 2.2 m high window whose sill is 9.0m above the ground. The rocket takes 0.17s to travel the 2.2m height of the window. What was the launch speed of the rocket, and how high will it go? Assume the propellant is burned very...

1. Two rockets, A and B, leave a space station with velocity vectors va and vb relative to the station frame S, perpendicular to each other. (a) Determine the velocity of A and to B, vba. (b) Determine the velocity of B relative to A, vab. (c) Explain why vab and vba do not point in...

Homework Statement The 3rd and 4th stages of a rocket, mass 40kg and 60kg respectively, coast in space with a velocity of 15,000kmh when the 4th stage ignites, with thrust T and causes separation. If the velocity of the 4th stage is 10m/s greater than the 3rd stage at the end of the 0.5...

In the consideration of rocket motion we always use the principle of the Conservation of Linear Momentum.This principle holds true only for isolated systems.But the initial stage of rocket motion is strongly affected by gravity-----which is definitely an external force [if we consider the rocket...

Homework Statement The missile has maximum horizontal range of 160km. What is the maximum altitude it can reach if launched vertically? Homework Equations v2=u2 +2as The Attempt at a Solution v=0 (because the velocity is zero when it is not rising anymore) u=0 a= -9.8 (up is the positive...

Homework Statement A rocket is fired upward from Earth with initial velocity v measured in m/s. Then maximum height in m is reached by the rocket is given by the function h(v)=Rv^2/2gR-v^2 Radius is 6.4(10^6)m and acceleration due to gravity g is 9.8m/s^2 (R and g are constants and v is the...

I am attempting to work out the changing velocity of a rocket on Excel. However, I cannot use the simple: \int{a} dt = v. at + C = v. If thrust is constant at 20 000 and the rocket is 2000kg with 600kg not made of fuel and 20kg lost every second, then would the equation be...

The rocket equation given by Delta V = Ve ln (Mo/M) says that Ve is the exhaust velocity of the rocket. The orbital velocity for Low Earth Orbit is about 7.8 Km/s. How then, is this velocity attained by a rocket which is fuelled only by a bipropellant rocket engine producing an exhaust...

Hey Guys, I have a problem, Say I have a rocket that has a mass about 350kg and produces 1250kg of thrust and I launch it horizontally, I know that 1250/350 gives me the acceleration in m/s2 (roughly 3.6 m/s2) but how do I then work out the speed? Also if I where to launch the rocket...

A rocket is launched vertically upwards until it uses up its fuel. It then falls back to Earth. Find the time when the rocket uses up its fuel from the graph. My answer was 20s. Is it correct?

hye.. i'm working on my FYP project on designing and building a rocket controller which will react on altitude change thus shifting the angle of its fin to make sure the rocket fly to the right altitude. can anyone help me with the topic?

Hello all, I recently made some model rockets and thought it would be fun to predict their height before setting them off this weekend. I thought it would also be interesting to compare the difference in the predictions of a model with no drag and a model with quadratic drag. Surprisingly...

I am currently constructing a supersonic rocket and am trying to empirically calculate the heat transferred onto all different parts of the missile body to know what materials to buy. However, I do not know how to calculate the heat transferred onto the fins of the rocket as it travels (the fins...

MP3 Rocket comes with special code that makes sure that only licensed files are shared. Sounds like the music companies are okay with this program.

I have an idea of creating a rocket using mentos and diet coke, but the failure rate is really high. I also tried reacting HCL + Mg in order to create pressurized Hydrogen Gas in the bottle, in order to make the rocket thrust upwards. I also used alka seltzer in creating a potential rocket, but...

Homework Statement A rocket has launched straight up, and its altitude is h = 10t2 feet after t seconds. You are on the ground 1000 feet from the launch site. The line of sight from you to the rocket makes an angle θ with the horizontal. By how many Radians per second is θ changing ten seconds...

Homework Statement A rocket of mass 0.5kg is shot vertically and burns for 1.5s, providing a constant force of 22N. After 1.5s what is the height of the rocket above the ground? The Attempt at a Solution by taking m*g of the rocket (downwards force) away from the 22N force...

I decided to draw this up when the idea came to me just so I could visualize it. I am no rocket scientist so I thouhgt I would post the concept and get some feedback:

I read from a physics website that says that an accelerating object experiences different acceleration throughout its structure according to special relativity. I never thought of that! "In special relativity, one finds that when a spacecraft maintains its structural integrity, so that the...

Homework Statement Derive from Newton II the thrust (the force produced by the rocket exhaust) achieved by a rocket motor which ejects material with constant velocity u and mass ejection rate a. Homework Equations The Attempt at a Solution Not sure...I know how to derive vf =...

Homework Statement Does changing the thrust(amount of gunpowder) in the rocket alter both the horizontal and vertical speeds? Homework Equations I worked this bit out Rocket A has less gunpowder and horizontal motion was 8m/s Rocket B with more gunpowder was 10m/s [b]3. The...

Homework Statement A rocket moving towards Alpha Centuari at 1000ms^-1 fires its rockets, accelerating backwards at a constant rate for 5 minutes. During this 5 minutes, the rocket moved 240km close to the star. What was the acceleration? Homework Equations I have no idea what formula you...

Homework Statement A toy rocket consists of a plastic bottle which is partially filled with water. The space above the water contains compressed air. At one instant during the flight of the rocket, water of density p is forced through the nozzle of radius r at speed v relative to the nozzle...

Homework Statement You are working as an engineer in a space company. During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad and accelerates upward at a steady 3.30m/s2. When it is 235m above the launch pad, it discards a used fuel canister by...

Homework Statement What is the acceleration of the rocket at a time of 5seconds after the parachute opens. Homework Equations F=ma The Attempt at a Solution I simply thought the acceleration would be 9.8m/s/s

A rocket with initial mass of 7.30×103 kg is fired in the vertical direction. Its exhaust gases are ejected at the rate of 6.00×101 kg/s with a relative velocity of 2.100×103 m/s. What is the initial acceleration of the rocket? What is the acceleration after 29 s have elapsed?

Hi I have a few question i don't understand how to complete. Homework Statement A model rocket leaves the ground, heading straight up at 49m/s. a)What is the maximum altitude?What are its speed and altitude at b)1s c)4s 2. Homework Equations ( For all questions) Constant acceleration...

[b]1. A faulty model rocket moves in the xy-plane (the positive y-direction is vertically upward). The rocket's acceleration has components a_{x}(t)= \alpha t^{2} and a_{y}(t)= \beta - \gamma t, where \alpha = 2.50 {\rm m}/{\rm s}^{4}, \beta = 9.00 {\rm m}/{\rm s}^{2}, and \gamma = 1.40 {\rm...

Homework Statement A rocket is launched at an angle of 53 above the horizontal with an initial speed of 75 m/s. It moves for 25s along it's initial line of motion with an overall acceleration of 25 m/22. At this time its engines fail and the rocket proceeds to move as a freebody. a) What...

what equation would i use to find the max velocity and max alt of a rocket. the probem gave me mass of rocket (g), mass of engine (g), mass of propellant (g), average thrust of engine(Newtons), burn duration of the engine (seconds). i got an example which is massrocket=23,mass...

Homework Statement In this problem we explore a slightly more realistic model of a rocket's acceleration still neglecting air resistance. Consider a rocket fired straight up from rest burning fuel at the constant rate of b kg/s. Let v=v(t) be the velocity of the rocket at time t and suppose...

Homework Statement A rocket that starts at rest with mass M ejects exhaust at a given speed u. what is the mass of the rocket(including unused fuel) when its momentum is maximum? Homework Equations p=mv The Attempt at a Solution well basically i used conservation of momentum to get...

Hello! I'll pose the question first: A rocket is fired straight up, burning fuel at the constant rate of b kilograms per second. Let v=v(t) be the velocity of the rocket at time t and suppose that the velocity u of the exhaust gas is constant. Let M=M(t) be the mass of the rocket at time t...

Homework Statement A model rocket initially at rest on the ground is fired vertically upward, and the engine thrust produces a constant acceleration a = 40 m/s2. After running for 2.5 s the engine is cut off and then the rocket is in free fall. (a) Find the maximum height that the rocket...

(I apologize in advance if this should have been merged with my other topic. 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. You can ignore any...

rocket problem (time is wrong!) Homework Statement A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.0 m/s at ground level. Its engines then fire and it accelerates upward at 4.00 m/s^2 until it reaches an altitude of 1000m. At that point its...

Homework Statement When a rocket reaches an altitude of 40m it begins to travel along the parabolic path (y-40)^2=160x, where the coordinates are measured in meters. If the component of velocity in the vertical direction is constant at vy=180m\s, determine the magnitudes of the rockets...