What is Launch: Definition and 351 Discussions

A launch vehicle or carrier rocket is a rocket-propelled vehicle used to carry a payload from Earth's surface to space, usually to Earth orbit or beyond. A launch system includes the launch vehicle, launch pad, vehicle assembly and fuelling systems, range safety, and other related infrastructure.Orbital launch vehicles can be grouped based on many different factors, most notably payload mass, although price points are a major concern for some users. Most launch vehicles have been developed by or for national space programs, with considerable national prestige attached to spaceflight accomplishments. Payloads include crewed spacecraft, satellites, robotic spacecraft, scientific probes, landers, rovers, and many more.
Orbital spaceflight is difficult and expensive, with progress limited by the underlying technology as much as human and societal factors.

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  1. P

    Calculating Initial Speed of a Rocket Launch

    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...
  2. C

    Find launch speed given spring constant and compressed distance

    Homework Statement A potato gun contains a spring which is compressed a distance of 7.30cm (0.073m) when it is loaded. If the spring's constant is 41N/m, what is the launch speed of a .00321kg piece of potato when the gun is fired? Give the answer in m/s. Homework Equations Power = W/T...
  3. R

    Solving for Planet Islander's Radius from a Projectile Launch

    Homework Statement a projectile of mass m is launched vertically from the surface of Planet Islander at a speed that is one-third the escape speed from the surface. If the projectile reaches a maximum height that is a distance h from the surface of the planet, what is the radius of planet...
  4. K

    Finding the Launch Angle of an Artillery Gun

    Homework Statement An artillery gun is trying to hit a target that is 12.5 km away. If the shell is fired at 650 ms-1 at what angle above the horizontal should the gun be fired to hit the target assuming that air resistance is negligible? [g=9.8 ms-2] Homework Equations I tried using v^2_y...
  5. J

    Calculate time traveled from launch to land

    Homework Statement So, this is pretty easy and simple, I am just missing something obvious here I am pretty sure. This stems from a question I asked earlier tonight. Calculate the time it took from launch to land, given a velocity of 30.197m/s, and a distance traveled of 85m. (other...
  6. I

    Maximum altitude of a rocket launch

    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...
  7. I

    C# Creating GUI launch application in C#

    I wanted to create a GUI that would launch a series of .exe files My biggest problem right now is I do not know how to program the buttons to launch the executable files. I have done some coding with C# but never any GUI work and not sure how to start. I also wanted to see if there was...
  8. P

    Calculate Rocket Launch Speed | Andrew's Problem

    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...
  9. B

    Momentum graph given, find the launch angle, level ground

    Calculus based course, this is from the "linear momentum of a system of particles" section. I've attached a rough sketch of the graph from my textbook. The main points of the graph are this, it's a parabola, at T=0 and T = 4.5, P(momentum) = 6. At T= 2.25 (maybe) it bottoms out. I say maybe...
  10. J

    Calculating Helium Balloon Buoyancy Force at Launch and 2km Altitude

    Homework Statement A helium meteorological balloon is made of a bag of impervious fabric that does not stretch, and when fully inflated forms a spherical shell of 1m diameter enclosing the He. At launch it is filled with He (at STP) to 15% capacity. The launch takes place in the Antarctic, in...
  11. I

    Launch Loop to Space: Questions & Answers

    Hello guys, this is my first post here so sorry if I put it in the wrong section. I heard the idea of a launch loop to space and thought it was really cool so I wonder why they haven't build it yet. Now since I'm no physics expert I need some clarifications on the physics in building it...
  12. N

    Angle of Change: Rocket Launch 10 Seconds Later

    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...
  13. B

    Launch with Chains: Solving a Hard Physics Problem

    I've read the FAQ and this is not homework, it is just a hard problem I can't solve. Conservation of energy cannot be used because inelastic collisions occur in bringing parts of the rope from zero velocity to v I start by setting up that the total mass at a position y is...
  14. B

    Inelastic Launch Homework: Maximum Height & Velocity

    Homework Statement A mass M attached to an end of a very long chain of mass per unit length \lambda , is thrown vertically up with velocity v_{0}. Show that the maximum height that M can reach is: h=\frac{M}{\lambda}\cdot \left [ \sqrt[3]{1+\frac{3\cdot \lambda\cdot v_{o}^{2}}{2\cdot...
  15. B

    Launch of a mass attached to rope with mass

    Vertical Launch of an Attached Mass Homework Statement A mass M attached to an end of a very long chain of mass per unit length \lambda , is thrown vertically up with velocity v_{0}. Show that the maximum height that M can reach is: h=\frac{M}{\lambda}\cdot \left [...
  16. P

    Rocket Launch Question: Calculating Height After 1.5s with Given Mass and Force

    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...
  17. M

    Witness the Shuttle's Final Launch: A Time-Lapse Movie

    Whatever you think of the shuttle as an effective way of getting stuff to orbit it's still a cool piece of engineering. Here is a time-lapse movie of it's last day at work. http://www.airspacemag.com/multimedia/videos/Go-For-Launch.html ps. sorry you have to watch a 20sec ad first...
  18. X

    Create a trebuchet that is able to launch a 1ft boulder

    I am attempting to create a trebuchet that is able to launch a 1ft boulder (approximately) 100 yds using a trebuchet mechanism. My current idea is basically to use three 80 lbs bags of cement as the counterwieght and use a sling system at the end of the arm as the launching component. On...
  19. J

    Explaining the relationship between launch angle and displacement

    Moderator's note: two threads merged into one. -- Redbelly98 Homework Statement what is the relationship between the launch angle and the displacement of a projectile, is it possible to say that the launch angle is proportional to displacement, can it be done mthematically by using...
  20. M

    Apollo 11 launch at 500 frames per second

    http://www.petapixel.com/2010/04/26/apollo-11-launch-at-500-frames-per-second/ High speed footage of the Saturn V's engines starting and lift-off with a very informative technical commentary.
  21. M

    Launch - universal gravitation

    Homework Statement A small package is fired off Earth's surface with an unknown launch speed, but with a known launch angle of 51.0 as measured from the local horizontal. It reaches a maximum height above the surface of 6380.0 km, a value equal to Earth's radius itself. What is its speed when...
  22. C

    Egg Launch and Recover-I need NASA level help

    Egg Launch and Recover--I need NASA level help! Homework Statement Another variation on the classic Egg Launch and Egg Drop Science projects, only this 9th grade science teacher believes in upping the ante. Goals are to launch a raw egg, achieving at least 30 feet of vertical height, using...
  23. G

    Calculating Distance for Plastic Leprechaun Launch

    Homework Statement I have this lab and my goal is to find how far I should place a box if I was to catch a plastic leprechaun that weighs 22.4 grams fired out of an air cannon. I did this lab and the final velocity I ended with was 12.76 meters/sec (29.72 meters was the average distance and...
  24. C

    Force Problem (Rocket Launch)

    Homework Statement A Saturn-Apollo rocket has a mass of 5.40 x 105kg. What is the initial acceleration of the rocket if the thrust at lift off is 7.40 x 106 N? How high will the rocket rise one minute after launch? Homework Equations Fg=mg FNET=ma The Attempt at a Solution I used...
  25. J

    Launch a Ping Pong Ball with a Planar Bistable Mechanism: Step-by-Step Guide

    Hello all, Basically we need to come up with a planar bistable mechanism that will launch a ping pong ball. Here's a quick image I made: http://freewebsite.0nyx.com/images/mech.html The club link is supposed to hit the ping pong ball and the goal is to make it go as horizontally far as...
  26. K

    Finding Arc Length when given velocity and launch angle

    Homework Statement Find the arc length of the projectile from launch until the time it hits the ground, given that 0 V is 100 feet/sec and is 45 degrees. Homework Equations Arc Length= ∫_a^b▒√(█(1+(f^' (x) )^2@)) dx Arc Length of Curve= ∫_a^b▒〖v(t)dt=∫_a^b▒√((dx/dt)^2+(dy/dt) )〗^2...
  27. J

    Launch Eggs Off Balcony To Target 12M away

    I need some help brainstorming ideas for an engineering project I am doing. We are supposed to be replicating a skyscraper escape system scaled down. In place of a skyscraper we have a 25 ft balcony. In place of people we have a dozen grade A eggs. I need to design a device that can get the...
  28. A

    Launch velocity of the projectile

    Homework Statement A projectile is launched in such a way as to have a time of flight of 41s and a range of 11 750m. Calculate: a) the maximum height reached; b) the launch velocity of the projectile. Homework Equations h=ut-1/2gt^2 The Attempt at a Solution h=-1/2gt^2 -1/2 *...
  29. C

    Designing an air gun to launch simulated rpg's

    I am designing a simple air gun to launch a 1 kg projectile 50 m at 100 m/s. I estimated the drag & calculated the necessary angle for this, but I ran into a bit of difficulty with the pressure/valves. I need to use an air compressor at around 125-150psi to power it. I'm still a freshman...
  30. F

    Calculate the max launch speed

    Ok, so for a summative project, my group has to build a catapult which must use elastic bands to propel an object. I have the energy, force, and maximum stretch distance of the elastic band. The values are 8 joules, 16 Newtons, and 0.5 meters. The catapult is not built yet, so I can't give any...
  31. D

    What is the Launch Speed of the Package?

    Homework Statement A spaceship is coasting with a constant velocity of 124 m/s. The ship fires a deep space "care package" of mass 1300 kg. The firing of the care package brings the rocket ship to a halt. If the mass of the spaceship, not including the rocket, is 4.0 x 106 kg, what is the...
  32. V

    Find initial min launch velocity with coeffcient of restitution

    Homework Statement Hi new to the forum, I am trying to make a ball bounce into a cup by hitting it with a paddle, giving it [V1 @ theta 1 wrt horizontal]. It travels a vertical distance delta y1 and a horizontal distance delta x1 before stricking the table in a semi-elastic collision...
  33. F

    Horizontal velocity required to launch into orbit?

    At what horizontal velocity would a satellite have to be launched from the top of Mt. Everest (elevation 8848 m) to be placed in a circular orbit around Earth? I'm not sure where I'd start here, any tips?
  34. G

    Trajectory and Force Problem: shot putter launch

    Homework Statement A shot putter launches a 7.22 kg shot by pushing it along a straight line of length 1.84 m and at an angle of 33.0° from the horizontal, accelerating the shot to the launch speed from its initial speed of 2.3 m/s (which is due to the athlete's preliminary motion). The shot...
  35. S

    Ares I launch in few minutes, maybe

    Tentative launch at 8:15 AM EDT (12:15 UTC). (Note I've been editing this opening post since yesterday, to reflect changing launch times.)High resolution NASA feed (1.2 MBPs): http://playlist.yahoo.com/makeplaylist.dll?id=1368163 different formats: http://www.nasa.gov/ntv follow the...
  36. M

    Projectile motion- initial velocity and launch angle

    Homework Statement Basketball player throws the ball form the middle of the court one second before the game ends. How much must the initial velocity of the ball be and at what angle it must be thrown, if it should hit the basket at the exact time of siren without preceding reflection from...
  37. L

    Projectile Que HELP- Finding Launch Angles

    Homework Statement A fire fighter directs a stream of water from a fire hose into the window of a burning building. The window is 20.0 m above the level of the nozzle and 60.0 m away. The hose produces a jet of water at a constant nozzle speed of V0 = 30.0 m/s. The fire fighter can...
  38. J

    Solving for Launch Speed: Cal & Henry's Sled Jump

    Homework Statement Cal and Henry are riding on a sled. They are trying to jump the gap between two symmetrical ramps of snow separated by a distance W . Each ramp makes an angle θ with the horizontal. They launch off the first ramp with a speed VL. Cal, Henry and the sled have a total mass m...
  39. M

    What is the projectile's launch speed?

    I though i was starting to understand but now i don't know anymore.. so please help! i have tried to figure it out myself .. but i just don't know where to start 1.A bullet is fired from a rifle that is held 1.6m above the ground in a horizontal position. The initial speed of the bullet is...
  40. N

    General Launch Angle Question

    Homework Statement On a hot summer day, a young girl swings on a rope above the local swimming hole . When she let's go of the rope her initial velocity is 2.10 m/s at an angle of 35.0 degrees above the horizontal. If she is in flight for 0.615 s, how high above the water was she when she let...
  41. L

    Launch a Pumpkin: Find Angle & Velocity to Clear Hedge & Enter Window

    [b]1. A pumpkin is launched into a window. There is a hedge that is 8m high and 10m from the window. THe window is 1m in height and 1 m from the ground. THe pumpkin is .75m from the ground at initial position. a) Find the initial launch angle and velocity to clear the hedge and make it into...
  42. E

    How does mass affect the launch of a catapult and the projectile flight?

    How does mass affect the launch of a catapult and the projectile flight?? Homework Statement How does the mass of the projectile affect the projectile as it is being lauched and after it is launched? Could your catapult launch a tennis ball and a boulder equally well? Once in flight...
  43. D

    Analysis of Rocket Launch at 53 Degrees

    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...
  44. R

    Solve Shot Put Launch Angle Homework: Speed 15.1m/s

    Homework Statement The men's world record for the shot put, 23.12m, was set by Randy Barnes of the United States on May 20, 1990. If the shot was launched from 6.00ft above the ground at an initial angle of 42.0o, what was its initial speed? Homework Equations...
  45. E

    Zero angle launch problem: Find height given inital speed and angle

    Homework Statement A basketball is thrown horizontally with an initial speed of 4.40 m/s. A straight line is drawn from the release point to the landing point making an angle of 30.0o with the horizontal. WHAT WAS THE RELEASE POINT? Homework Equations tan\theta = y/x vfx= vix= 4.40...
  46. S

    Solve for Ball's Height After Launch in Circular Chute

    A ball is launched up a semicircular chute in such a way that at the top of the chute, just before it goes into free fall, the ball has a centripetal acceleration of magnitude 2 g. How far from the bottom of the chute does the ball land? Height=2R I got initial velocity=sqrt(2gR), and I...
  47. M

    How can I launch a rocket from 200 feet away?

    I am trying to launch a rocket 200 feet away from the rocket. When the switch is thrown to "ON" the electrical circuit is turned on which sends an electrical current into the motors. I can launch the rocket just fine if I am standing right there to flip the switch, but as i increase the distance...
  48. J

    Rocket trajectory in vertical launch then free fall

    Homework Statement A rocket is launched to travel vertically upward with a constant velocity of say...20 m/s.After travelling maybe 35 s the rocket develops snag and its fuel supply is cut off. the rocket then travels like a free body, the height achieved by the rocket will be...
  49. K

    Calculating Drag Racing Vehicle Launch Force

    hi, I am currently building a drag racing game and I am wanting it to be as physically accurate as possible. my question is, when a driver drops the clutch in a vehicle what needs to be taken into account to calculate the force acting on the vehicle while the wheels are spinning? is it possible...
  50. L

    Atlantis to Launch 2:00 PM

    http://www.washingtonpost.com/wp-dyn/content/article/2009/05/10/AR2009051001513.html
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