Launch Definition and 342 Threads

Homework Statement at 1/2 of its maximum height, the speed of a projectile is 3/4 of its initial speed. what was its launch angle?(ignore any effects due to air resistance.) Homework Equations The Attempt at a Solution I don't even know where to begin.

My friend (whom I normally trust) told me something I did not know and would like to verify. We were watching a shuttle launch, talking about the main engines which, while much fainter than the boosters, can be seen in the right light...

Homework Statement A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 53.9 . The acceleration period lasts for time 5.00 until the fuel is exhausted. After that, the rocket is in free fall. Find the maximum height reached by the...

Could one of you mechanical geniuses please help out a dumb ol' elec engr? I've searched the boards for a few hrs now, but can't seem to get confidence in my answer to what should be a simple problem. I'm trying to build a simple a simple tennis ball launcher to fire a ball out at 70mph --...

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

how much magnetic force would it take to launch 1,000 , 5,000 and 10,000 pounds into orbit? of say 270 miles up, using an electromagnet. also how much energy would be required to produce this force and lastly how much energy can be gotten from a dam(hydroelectric power plant) and how much...

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 =...

Homework Statement On earth, a ball is launched over level ground. It's vertical equation of motion is y(t) = -4.9(t2 - 8t - 20) A) Find tymax and ymax B) Find vyinitial and vyfinal Homework Equations y(t) = Yi + via + 1/2at2 Vf = vi + at The Attempt at a Solution I tried...

Homework Statement A stone is thrown horizontally at 5.0 m/s from the top of a cliff 78.4 m high. a. How long does it take the stone to reach the bottom of the cliff? b. How far from the base of the cliff does the stone strike the ground? c. What are the horizontal and vertical components...

If everything goes well, the PSLV-C11 will be launched from the Satish Dhawan Space Centre tomorrow at 06:20 Hrs IST (22 October 00:50 UTC). We are well into the (NE) Monsoon, but according to news reports, the scientists are not worried about rain as much as they are about lightning storms...

Homework Statement Suppose a very narrow, very tall wall of height H stands between two children who are trying to play catch. The wall is a distance x[SUB][wall] from the thrower, and the catcher is distance X[SUB][F] from the thrower. In this problem you will calculate the lunch angle...

URGENT! General Launch Angle Problem Homework Statement A batted baseball leaves the bat at an angle of 25.0 above the horizontal and is caught by an outfielder 370 ft from home plate at the same height from which it left the bat What was the initial speed of the ball? How high does the...

Hi Does anyone know if it's possible to see LHC launch tonight on TV in the United States (as opposed to webcast)? I have a FTA dish. There's nothing in Dish network program guide. CERN website shows a few satellites but the only one visible from continental United States is C-Band.

What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to 8REarth before coming to rest momentarily? I think the formula for this problem is 1/2 mv2-G(mME/RE)=G(mME/2RE); I cancel out the m because it is in every variable; but whenever I plug...

The videorecord of GLAST launching is available now on the website of Virtual Institute of Astroparticle physics 1-Glast official video 2-Glast launch as seen from the beach http://www.cosmovia.org/:wink:

Hello folks! I was just watching a YouTube clip of the American MLRS system being used during Operation Desert Storm in 1991. I'm afraid I can't post a direct link to the video because of the 15 posts requirement, but if one does a search for "MLRS" it is the first video in the results...

http://glast.gsfc.nasa.gov/ http://scienceblogs.com/catdynamics/2008/05/glast_launch_schedule.php

[SOLVED] Distance a rocket travels on a launch ramp Homework Statement A 1600kg rocket is to be launched with an initial upward speed of 51.0m/s . In order to assist its engines, the engineers will start it from rest on a ramp that rises 53 degrees above the horizontal. At the bottom...

Homework Statement I've been tasked with designing a projectile launcher that must be built using either elastic bands or springs. The objective is to measure the launch velocity against the distance the projectile is pulled back before release. The launcher itself isn't supposed to be very...

[SOLVED] The Angle of the Launch of a Rocket against a Strong Wind Homework Statement A 1210-kg rocket is launched with an initial velocity v = 85 m/s against a strong wind. The wind exerts a constant horizontal force F= 8650 N on the rocket. At what launch angle will the rocket achieve its...

Atlantis Launch on February 7th! http://www.kennedyspacecenter.com/launches/scheduleStatus.asp" I'm going to be in Orlando from the 31st to the 8th! can someone tell me how I can go see this!? it looks like you have to buy tickets or something from the sight? I am an avid photographer and...

http://www.nature.com/news/2008/080123/full/451382b.html My brother went to the new creationist museum just for a kick. He said it was hilarious how ridiculous it was.

You throw a ball with launch velocity of \overrightarrow {v_i}=(3m/s)\widehat{i}+(4m/s)\widehat{j} toward a wall, where it hits at height h_1} in time t_1 after the launch. Suppose that the launch velocity were, instead, \overrightarrow {v_i}=(5m/s)\widehat{i}+(4m/s)\widehat{j}. Would the time...

This is an old video of the GPS launch back in Jan '97. The launch controllers sit in a blockhouse fairly near the launchpad, which is kind of cool. Working in a restricted area, they always got the good parking spaces. http://shock.military.com/Shock/videos.do?displayContent=157296&ESRC=dod

Homework Statement A basketball is thrown horizontally with an initial speed of 4.20 m/s. A straight line drawn from the release point to the landing point makes an angle of 30.0° with the horizontal. What was the release height? Vox=4.20 m/s=Vx Ax=0 Voy=0 m/s Ay=-9.81 m/s^2 Theta=180*-30.0*...

Homework Statement Hi Guys, First post, so please take it easy on the noob The problem is designing a MATLAB program for a rocket that has the user enter the following; 1) Launch angle 2) Launch velocity (ft. per sec) 3) Distance to target 4) How high the target location is above...

General Launch Angle (Vectors) PLZ HELP URGENT Homework Statement In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall witha speed of 13m/s at an angle of 24 degrees above the horizontal. a) how long does it take for the ball to reach the...

Someone Please Help - Ramp Launch And Friction ! 1. Homework Statement A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 35* angle. The block’s initial speed is 10m/s. (Given that μk = 0.20) a. What vertical height does the block reach above its starting point? b...

Lets say Mt. Everest was located on the equator. How much more efficient would it be to launch a rocket from the top of this mountain as compared to a sea-level Florida launch? There would be much less atmosperic drag since you would be starting out 5-miles high. You would be slightly closer to...

Alright what i am trying to do is to find the proper ratio of water in a water bottle. The Bottles are 591 ml and 2 L I am trying to figure out the equation to get the maximum height of the rocket. Does anyone know how i can get this equation ? i haven't factored the...

First, let us consider an object launched vertically upward with an initial speed v. Neglect air resistance. What is the speed of the object at the height of (1/2)h max? i know that h max = (initial v in the y direction / 2g) and i also know that Kinitial +Uinitial =Kfinal +Ufinal or 0.5(mv^2) =...

hey guys, my classmate and i have to design a device that will launch a golf ball 15m, using either a spring (which is what we're going to use) or elastic we need to find the value of the spring constant(we can do that), an expression to determine the initial velocity of the ball, an equation...

I know that as a rocket is launched closer to the equator it gets more of a "boost" in velocity due to the Earth's rotation, but I was wondering if anyone could explain the mechanism (e.g. the mathematics) behind this. I can visualize it but I don't see how the extra velocity gets added...

Is it possible to launch the satellite into orbit with inclination less than of latitude of the launch site? Can you please explain to me using some formulas.

Homework Statement A projectile's launch speed is 6.4 times its speed at maximum height. Find the launch angle 0. Homework Equations I know that the x-axis has to be the horizontal and the y-axis, vertical. I know I also have to use the square root of V0x squared plus V0y squared = 6.4...

Hi I would like to have the answers of a few basic questions. I would like to know that in a space shuttle, how is the oxygen level maintained? How does a space shuttle enter into the space? Does it just go staright from the Earth's atmosphere to the space or it has to follow a...

with the first teacher in space. If you haven't seen this, the story is pretty interesting. Recall that the first teacher in space died in the Challenger accident. Just search the news and you will see the story.

"launch a weather rocket" prbm Homework Statement A 1000 kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 11 s, then the motor stops. The rocket altitude 15 s after launch is 4600 m. You can ignore any effects of air resistance. a) Acc. of...

Homework Statement A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H of 32.0 m above sea level, directed at an angle q above the horizontal with an unknown speed v0...

Homework Statement Vi= 26.06 m/s Mass= 0.5 Kg Angle of launch= 45 degrees time of flight= 3.61 sec range= 64m I need to find the force given to the projectile on the cannon during the launch, and due to the formula F=MA, I am missing A, but I have not formula to find the acceleration of...

An athlete starts to swing a hammer in a 2m radius circle which is tilted up on one side. Each complete 360 degree swing takes 0.71s. The angle of the plane of the circle to the horizontal is 45 degrees. The hammer is released at a height of 1.5m from the ground, at an angle of 45 degrees to...

Homework Statement An object was launched from the top of a cliff at some angle with an acceleration of 50 ft/sec that overcame gravity. The fuel tank ran out after 2 seconds of flight and gravity took over from that point forward. The object reached a maximum height of 310 ft, was in the air...

Homework Statement Find the energy required to launch a satellite from Earth into circular orbit at radius 5Re in units of joules. Msat = 1000 kg Me = 5.98e24 kg Re = 6.37e6 G = 6.67259e-11 Homework Equations F = GMm/(r^2) The Attempt at a Solution I'm thinking somehow...

Ok, let's face it, space shuttles are expensive. Very expensive. Wouldn't it be great if we could find a low cost alternative vehicle to launch into space, like, oh, I dunno, a Reliant Robin- one of those crappy little three wheel cars that have been mocked continuously from their release to...

Homework Statement Fairgoers ride a Ferris wheel with a radius of 6.00 m, the bottom of which is 1.75 m from the ground. The wheel completes one revolution every 28.0 s. A passenger drops his keys when he is three quarters of the way up and at an angle of 45° to the vertical. Where do the keys...

Homework Statement At .5 of its maximum height, the speed of a projectile is .75 of its initial speed. What was its launch angle? Homework Equations (1)V1y = V0y - gt (2)y1-y0 = V0yt - .5gt^2 The Attempt at a Solution The part that really bothers me is the second part of the first statement...

I would like to know what the Optimum Angle of Launch would be for an object projecting forward to obtain maximum distance. The object will be traveling approximately 25 mph and will launch off a surface 2 feet above the ground. What is the Optimum Angle of Launch to get that object to the...

I'm having some difficulty with a projectiles question. "A projectile is fired with an initial speed of 26.0 m/s at an angle of 40.0 degrees above the horizontal. The object hits the ground 8.00 s later." The first part of the question is: "How much higher or lower is the launch point...

Best way to launch a marshmallow? I have a limit of $20 to build a small launcher. It will launch a large marshmallow. What is the best way using items bought from any retail stores? It has to land in the same place consistantly and for 50feet. I am thinking something along the lines of...

This is a one dimensional problem just in case anyone needlessly accounts for horizontal velocity. An egg is thrown upward from the edge of a building. The egg falls next to the edge (i.e., without hitting it) and after traveling down 50 more meters more, it has been 6 seconds since the egg...