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How does astronauts go into space when there is gravity?
The massive speed and acceleration of the spaceship is so great, that they are able to escape Earth's gravitational pull. Then at around the correct altitute, they can orbit the Earth safely.
If an astronaut is weightless orbiting the earth at 100 miles up would you experience weightlessness at the top of a 100 mile step ladder What equations would prove or disprove?
The person on the ladder would not feel weightless because they are not in orbit, they are simply at a high altitude. If they let go, they would fall straight down towards the earth's center just as any other object which is being pulled on by gravity.Orbit is achieved through velocity. With enough thrust, a rocket is able to propel an astronaut to a speed which will send him beyond the earth's gravitational field and straight into space (ie: "escape velocity"). However, by controlling the level of thrust and angle of inclination, the astronaut can be placed in an area of space that is somewhere "in-between" the pull of earth's gravity and the escape velocity. This is called "orbital velocity". The astronaut achieves ORBIT, and he is in a constant free-fall circling around the earth: not quite fast enough to escape the earth's gravity, but not so slow that he falls back to earth.When a spacecraft needs to return to earth, thrusters are fired in the direction of orbit, which decreases forward speed, and allows the craft to return to earth via the earth's gravitational field with help from atmospheric drag.
How did the astronaut keep from floating away on the moon?
There isn't much gravity in empty space, but there is a great deal of gravity near planets, stars, moons and other celestial bodies. The moon has gravity because it has mass. Everything with mass has gravity (including you, albeit a VERY small amount). That's how the astronauts stayed on the moon, and the reason why their movements were slow because the moon has about 1/6 the amount of gravity as Earth.
Why do astronauts float weightlessly in space?
There is (apparent) zero gravity. The absolute gravity in orbit is about 90% of what it is on the surface of the earth, but the effective gravity is zero, and for a good reason.The fact is that in orbit, you are actually falling, but your forward speed is such that the curvature of the planet is dropping at the same rate that you are falling.And the astronauts are falling at the exact same speed as their capsule. This is called freefall.
Escape velocity is the speed required to?
escape the gravitational well and if the planetoid has one, the atmosphere.
What is the name for the speed a rocket must reach to escape the earth's gravity?
Escape velocity is the speed that a rocket must reach to break free from Earth's gravity and enter space. It is the minimum velocity required for an object to overcome the pull of Earth's gravity.
What is the speed maintained by a rocket if it is launced in outer space so it will escape the earth's gravity?
According to most sources, the minimum speed needed to escape the Earth's gravity is 11.2km/s, so a rocket would need to travel at least this fast to get into outer space.
How does a rocket get out of earths orbit?
A rocket gets out of Earth's orbit by achieving escape velocity, which is the speed needed to break free from the gravitational pull of Earth. The rocket's engines provide thrust to accelerate it to this speed, allowing it to overcome Earth's gravity and travel into deep space.
How does a single stage rocket get off the earth?
A single-stage rocket gets off the Earth by igniting its engines at liftoff, generating thrust that overcomes Earth's gravity. The rocket gains speed and altitude until it reaches the required velocity to enter orbit or escape the Earth's atmosphere.
What kind of force is it when rockets escape from gravity?
If the rocket has a certain speed, it will escape from gravity due to its own momentum. To speed the rocket up, currently chemical combustion is used. The burning gas goes out in one direction, thus pushing the rocket in the opposite direction.If the rocket has a certain speed, it will escape from gravity due to its own momentum. To speed the rocket up, currently chemical combustion is used. The burning gas goes out in one direction, thus pushing the rocket in the opposite direction.If the rocket has a certain speed, it will escape from gravity due to its own momentum. To speed the rocket up, currently chemical combustion is used. The burning gas goes out in one direction, thus pushing the rocket in the opposite direction.If the rocket has a certain speed, it will escape from gravity due to its own momentum. To speed the rocket up, currently chemical combustion is used. The burning gas goes out in one direction, thus pushing the rocket in the opposite direction.
In order to escape the gravity of earth a space vehicle near earth must have a speed of about?
about 25,000 mph to completely escape earth's gravity
How is the force of earths gravity overcome when an object is launched into space?
When on Earth, you can escape if you move away from the Earth at the "escape" speed. Gravity will slow you down and you will reach zero speed at an infinite distance.
How using Earth's rotation speed to escape gravity?
Earth's rotation speed doesn't affect the ability to escape Earth's gravity. Escaping Earth's gravity requires reaching a velocity of about 11.2 km/s regardless of Earth's rotation speed. Earth's rotation does provide a slight boost to the velocity required to escape in the direction of the rotation.
The speed and direction a rocket must have to break away from a planet's gravitational pull?
The speed is called the escape velocity. An object travelling at the Earth's escape velocity will never return to Earth because as it moves away, and decelerates under the Earth's gravity, the force pulling it back (its weight) is also reducing and if it is above the escape velocity it will escape altogether.
What is the speed of the earth to escape the sun's gravity?
The escape velocity from the Sun at the Earth's distance is about 42.1 km/s. This means that for an object to escape the Sun's gravity at this distance, it would need to travel at that speed. The Earth's orbital speed around the Sun is about 30 km/s, so it is not moving fast enough to escape the Sun's gravity.
Does a rocket always need the escape of 11.2 to escape the earth?
That's the initial speed the rocket would need to escape Earth, assuming it starts close to Earth, and no additional impulse is provided later. With a gradual impulse - for example an ion impulse - i.e., providing impulse over time, it isn't necessary to start with this speed. However, the rocket still needs the same total amount of energy to escape from Earth.
How did the Apollo 11 overcome gravity?
Apollo 11 overcame Earth's gravity by using a powerful rocket called the Saturn V. The rocket had multiple stages that ignited in sequence to propel the spacecraft into space. Once in space, the spacecraft's speed allowed it to escape Earth's gravitational pull and travel to the Moon.
