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Let's back up a bit and then it'll be clear why there is a demand for some serious speed in a given direction (velocity) to get the heck out of the gravitational well we're stuck in - and stay up. Ready? Let's jump. Grab a nice big rock, hold it out, and then drop it. What happens? Right. It falls to the ground. Take it up on a tall building and repeat the experiment (safely). What happens? Right again. It falls. Take it up in a plane and drop it. It falls. Now take it up a couple of hundred miles and let it go. What happens? Surprise! It falls. Why wouldn't it? The earth hasn't let go of it. Gravity is still pulling on it. What's up with that? Let's look as what we need to keep an object up there. If we get something big really high and outside the atmosphere, we need to do something to "break the grip" of gravity. (It hasn't let go.) It's already cost us a ton of money to get it up that high 'cause rockets are really expensive. What we need is some "sideways velocity" to keep our payload up. Gravity hasn't let go, so our rocket needs to shove things sideways as well as up. We have our rocket pitch over (change course) and begin that sideways acceleration not long after liftoff. That's what takes it "down range" and away from the launch pad (not just up). Our rocket is moving up and sideways; it's gaining altitude and is accelerating in a lateral direction. Picture our object high above the atmosphere. Way up. Picture the object stopped in time and space. Now picture the object one meter closer to earth because of the effect of gravity, but at the same time, picture it one meter at a right angle to "down" in the direction of orbit. Our object remains at the same altitude it was, but is "farther over" from where it was because of the lateral acceleration we gave it. Now another meter down and another meter farther over. Same result. It's still at the same altitude, but farther over. It's like the object is "stepping" around the earth. See how that works? What actually happens can be described exactly like this in infinitely small steps! (Welcome to the calculus!) Our object is in orbit because enough lateral acceleration has been applied during the burn of the main engines to give the payload "just the right amount" of "sideways" motion. It's high enough and moving fast so that its lateral velocity and gravity are in a "steady state" or are "balanced" and our payload stays in orbit. "Houston, we've achieved orbital insertion."
What else can I help you with?
How did you explain conservation of momentum when a rocket ship takes off?
Momentum P of a body with mass m and velocity v is given by:P = m∙vNewton's first law of motion establishes conservation of momentum on abody as long as there is no net force applied on it.Let's assume our Rocket Ship is about to be launched from the surface ofa planet with no gravity force, so we can leave out the influence of thisforce from the discussion.At time t ≤ 0 from launch, the Rocket Ship's velocity v is zero, and soits momentum P is also zero.When the Rocket Ship starts his motion upwards, the initial system (theRocket Ship), is now conformed by two subsystems: The Rocket Ship goingup and the exhaust gases being sent down.To give a simple view of what happens, lets assume that the massof the exhaust gases is expelled at a constant velocity vg through the wholeprocess till the Rocket Ship's engine stops. Then the final condition ofmomentum would be:P = mR∙vR + mg∙vg = 0where mR and mg are the final Rocket Ship's mass and the total mass ofexhaust gases expelled respectively, and vR the Rocket Ship's final velocity.You have to realize that the vectors of velocity VR and Vg will have oppositesigns.If we now would want to include the planets gravity force, this willbe affecting the momentum of the Rocket Ship by producing an accelerationin the opposite direction of its velocity. If we now think of the originalsituation of Rocket Ship and planet at rest, when the Rocket Ship ispushing away from the planet the gravitational attraction between theRocket Ship and planet works both ways. And so the lose of momentumby the Rocket Ship because of the gravitational force is compensated bythe planets lose of momentum in the opposite direction !.
What is the angular speed of the rod after the rings leave it?
The angular speed of the rod after the rings leave it is the same as before the rings left, as there is no external force acting on the system to change its angular momentum.
Where is the magnetic force the greatest on a magnet?
The magnetic force of a magnet is strongest at its poles. This is because the field lines of the magnetic field are most concentrated at the poles where they enter and leave the magnet. At the poles the magnetic field is strongest and the force is the greatest. The north pole is where the magnetic field lines enter the magnet. The south pole is where the magnetic field lines leave the magnet. The magnetic field lines are most concentrated at the poles. The magnetic force is greatest at the poles.
How fast does arocket travel?
The speed of a rocket varies depending on its mission and stage of flight. Typically, rockets can reach speeds of over 17,000 miles per hour (27,000 km/h) to reach Earth's orbit, and escape velocity to leave Earth's orbit is around 25,000 mph (40,000 km/h). However, during re-entry to Earth's atmosphere, rockets may reach speeds over 25,000 mph (40,000 km/h) to withstand the heat generated.
How do compel repel expel differ?
"Compel" means to force or urge someone to do something. "Repel" means to drive away or push back. "Expel" means to force someone to leave a place or group.
What is the factor in determining the amount of thrust a rocket requires to leave the earths atmosphere?
Payload weight
What is the main factor in determining the amount of thrust a rocket requires to leave the Earth's atmosphere?
Payload weight.
What is the main factor in determining the amount of thrust a rocket requires to leave the earths atmosphere?
The main factor in determining the amount of thrust a rocket requires to leave the Earth's atmosphere is the mass of the rocket. The heavier the rocket, the more thrust is needed to overcome Earth's gravity and propel it into space.
What is the main factor in determining the amount of thrust a rocket requires to leave earth atmosphere?
Payload weight.
What was the first ever man made object to leave the earths atmosphere?
The first man-made object to leave Earth's atmosphere was the V-2 rocket launched by Germany on October 3, 1942.
How do astronauts leave the earth?
astronauts leave earth by the liftoff of the space shuttle and rockets, it is called force of the rocket. The engine starts and liquid fuel comes out of the rocket and pushes them up.
What is the speed a rocket needs to go past Earth's gravitational force?
Escape velocity from Earth is approximately 11.2 km/s, which is the speed a rocket needs to surpass Earth's gravitational force and leave its orbit.
How the propulsion of jets and rockets is an application of newton third law motion?
For every action (force) there is and equal and opposite reaction (force). When fuel is burned in a rocket or jet, the hot expanding gases leave the rear of the engine. The opposite is the force pushing the rocket itself forward.
9 Can someone see this planet easily or is special equipment needed?
If you are referring to the earth, then yes. Very special equipment is needed. For one, a space shuttle or rocket ship so you can leave the earth's atmosphere. The only way tp see this planet is in a picture, or from space. If you are reffering to a different planet, then you will probably need a telescope.(obviously)
What happens to the rocket when they leave earth?
When a rocket leaves Earth, it continues to accelerate to overcome Earth's gravity and reach orbital velocity. Once in space, the rocket enters orbit or continues on its trajectory to its destination. Without the force of Earth's gravity pulling on it, the rocket stays in motion according to the laws of physics.
Would a rocket leaving the moon surface require as great a speed or force as one leaving the earth surface?
No, a rocket leaving the moon's surface would not require as great a speed or force as one leaving the Earth's surface. This is because the moon has lower gravity than Earth, so the escape velocity required to overcome gravity and leave the moon is lower than that required to leave Earth.
What is it like taking off for space?
Taking off for space is a thrilling and intense experience. You will feel the powerful force of the rocket engines propelling you upwards, the acceleration pushing you back into your seat, and the increasing pressure on your body as you leave Earth's atmosphere. It is a mix of excitement, adrenaline, and awe as you leave the planet behind and head into the vast unknown of space.
