Why does the Space Shuttle do a roll manoevre after take off?
464270
the Shuttle reaches a point about one minute after launch when the pressure force of the atmosphere rushing past the rapidly accelerating rocket reaches a peak. The roll maneuver is performed shortly before max q is reached because this "heads-down" orientation helps alleviate the stresses that the dynamic pressure loads cause on the vehicle's structure.
10985
I think It's all in the way you move your head honestly turn your head and arms in one direction and the rest of your body will follow but you are right if you do it before you launch it can make you lose some air just cause your body is reacting to to much to soon and try to think about the landing afterwards not just the spin  and of course experiment with how your body reacts to diferent moves until it becomes fluid---well good luck---
139268
One interpretation of the question is, why not just travel slower, continually applying thrust, e.g., a booster that goes at jetliner speed?  The reasons why that is impractical are:\n(1) you have to use a rocket since it must work beyond the atmosphere\n(2) with a rocket you carry all your propellant with you, unlike a jetliner which obtains reaction force from pushing back combustion products plus a large proportion of air\n(3) this means you don't have energy to spare \n(4) you have to put as much total (kinetic + potential) energy into the spacecraft whether you escape quickly or slowly\n(5) you want as much rocket impulse as possible to go into accelerating the spacecraft, and as little as possible spent just fighting gravity.  (Think what a waste it would be to hover on rocket power!)  This means high thrust for a short time to maximize kinetic rather than potential energy. \n\nSo you end up taking a modified "ballistic" approach, similar to firing the spacecraft from a cannon (which is all kinetic, no potential), but not so stressful and a little smarter.  You do all the accelerating during the first few minutes, then coast free of gravity.  You shape your ascent so your path is mostly vertical until you leave the atmosphere, to minimize energy wasted on air resistance.  In this phase you are providing some potential energy, but this can't be avoided.  Then you "level off" somewhat so your thrust isn't fighting gravity so much as you accelerate to escape velocity.
302547
When a vehicle accelerates forward, there is inertia that holds us back until we compensate for it.  The air in the bus also moves forward because it is contained and restrained by the walls, roof, floor, and windows.  The air that the bug is flying in is also first compressed in a backward motion and then stabilized.  Its a good thing, else when the bus moved forward if all the air pooled on the back window then the driver and everyone up front couldn't breathe.  Just as that air exerts an outward pressure upon itself and everything else (if there were no pressure, there would be no wind resistance) that keeps it from collapsing at the back of the bus when it moves forward, the bug continues flying by the same aerodynamics that permits it to fly in the first place.
607437
Actually it is a bot more complicated than those answers would show.\n\nThe spinning wheels cause a gyroscopic effect which makes it easier to balance.
61932
The force of friction always opposes the motion.  \n\nWhen a force is applied to a ball or wheel, it will start rolling, provided there is a resistive force preventing the wheel from simply sliding along the other surface. The force may be a torque applied to the axle of the wheel or a linear push or pull on the wheel. The resistance of static friction causes the rolling motion. If the wheel or tire has treads and the other surface is soft, then those treads provide extra friction known as traction.\n\nNote that the friction required to start rolling motion is not rolling friction, which is defined as the friction slowing down rolling motion.\n\nAccording to the law of conservation of energy, no energy should be lost due to friction. The kinetic energy lost is transformed primarily into heat and/or motion of other objects and fluids. An airplane will heat and accelerate the air as it passes. A submarine will do the same to the water. In some cases, the "other object" to be accelerated may be the Earth. A sliding hockey puck will come to rest due to friction both by changing its energy into heat and accelerating the Earth in its direction of travel (by an immeasurable amount)
629527
Pilots have to adjust their flight paths to compensate for the Coriolis effect.  This is something we can calculate.
264883
You don't go across, you go around.\n\nAnd, it depends on the type of plane.  The space shuttle can do it a couple times in a day.
973904
I presume you mean the external fuel tank?\nIt is jettisoned just before the shuttle reaches orbit, and the tank lacking just a bit of speed to actually make it in orbit, it falls back and burns up in the atmosphere.
36456
Thrust does not require air to "push off" of.  The propulsion is all based on Newton's laws: specifically, for every action there is an equal and opposite reaction.  If I push you with three lbs of force, I will also push myself back with three pounds of force.  From this, we can ultimately derive a conservation of momentum, which says that for me to issue a force onto an object and impart it with momentum, the force acting on me in the opposite direction will impart the same momentum.  Momentum is defined as the velocity times the mass.  So if a masive object exerts a force on a smaller object, the smaller object will go faster and the larger will go slower, but in the absense of other forces, they will have the same momentum.  When you fire a gun, the tiny bullet gets tremendous speed, while the much larger gun gets the same force but a much lower speed (what you would call "kick" in the gun.)\n\nthe same prinicple is at work in a space shuttle.  The products of combustion in the engine will be propelled backward at an enormous speed.  Though the shuttle is far larger, the force exerted forward on it is equal to the force exerted backward on the exhaust stream.  As the engine continues to fire, this force build up and up until the speed of the shuttle--unobstructed by wind resistence--can become enormous.
1060039
so that they roll. why are wheels round?
215867
The ejection of water WILL effect the shuttles attitude (direction). Any mass accelerated out will have an equal and opposite force against the shuttle (Newton's laws). But as it happens, the on board gyroscope detects minor forces causing permutations to the craft and compensates with thrusters.
1006732
As a previous poster correctly said, they have to launch at just the right time depending on where they are going.  For the upcoming launch, the space shuttle is going to the International Space Station.   The ISS orbits Earth (as all satellites do) so they have to launch the shuttle at the right time so that it's near the ISS when it (the shuttle) reaches orbit.  The ISS orbits Earth about once every 90 minutes, and the part of Earth it passes over keeps changing as Earth rotates, thus leading to a narrow launch window for the shuttle.\n\nBy the way, when the shuttle is orbitting Earth (this goes for the ISS, too) it doesn't zoom around in space they way they do in Star Wars or anything.  In fact, usually it doesn't have any rockets firing at all, it just orbits Earth, with the only force on it being the force of Earth's gravity.  The shuttle does have little rockets on it to make small changes in its trajectory, and to allow it to dock smoothly with the ISS.  My point is, if the shuttle were on the other side of Earth compared to the ISS, the shuttle wouldn't be able to dock with the ISS since the shuttle doesn't zoom around.
703038
When it breaks loose it would remind you of the space shuttle taking off.\n\nCoach
1010543
Suppose you are taking a space walk near the space shuttle, and your safety line breaks. How would you get back to the shuttle? The thing to do would be to take one of the tools from your tool belt and throw it is hard as you can directly away from the shuttle. Then, with the help of Newton's second and third laws, you will accelerate back towards the shuttle. As you throw the tool, you push against it, causing it to accelerate. At the same time, by Newton's third law, the tool is pushing back against you in the opposite direction, which causes you to accelerate back towards the shuttle, as desired. This is the principle behind jet propulsion: a jet rocket expels fuel rapidly by ``pushing against it''. By the third law the fuel exerts an equal and opposite force against the rocket so the rocket accelerates in the opposite direction that the expelled fuel goes. Another example of the 3rd law is a book lying on a table. If the table were not there the book would fall under the force of gravity between the book and the earth. Why then doesn't the book move off the table, in accordance with the 2nd law? The table is exerting a force on the book that is just enough to cancel the gravitational force on the book. By Newton's third law, the book is also exerting an equal and opposite force on the table, and this is why the table feels the weight of the book. If the book were very heavy, its weight would cause the table to bend, or even break. This is illustrated in the following figure. \n\nThe answer to this question comes from the third law. Imagine the skateboard again. On the ground, the only part air plays in the motions of the rider and the skateboard is to slow them down. Moving through the air causes friction, or as scientists call it, drag. The surrounding air impedes the action-reaction. \n\nAs a result rockets actually work better in space than they do in air. As the exhaust gas leaves the rocket engine it must push away the surrounding air; this uses up some of the energy of the rocket. In space, the exhaust gases can escape freely.
54730
Not clear what you mean?  How does it stay up in space? It does that because it is going very fast, which would take it away from earth, but gravity is pulling it back, causing it to curve, and go around the earth, just like a string on a yo-yo if you just whip it around your head. \n\nIf you mean, what does it do, there are different kinds, but most of them get power from solar panels, and have radio receivers and transmitters to communicate back to earth.
1086455
The first effect is centifugal force.  It is caused by the answer of the second question where the ball goes in a straight line.  The ball moving on it's own will continue in a straight line due to inertia unless an outside force acts upon it (the string).  The ball swings at the end of the string because it is trying to go straight, which would carry it away from you, but the string keeps it turning.  The same effect happens to space craft in orbit.   They go in a circle and would go off in a straight line except that gravity holds them.