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An object leaving the surface of the Earth would need to move at about 11.2 km
(7 miles) per second ... about 34 times the speed of sound!
If it did that, (and if there were no air dragging on it), then it could shut off the
rocket engines, and gravity could never pull it back to earth.
If the object is already some distance above Earth's surface, then the required
speed is less.
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∙ 11y ago
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Can a slow object travel as far as a fast object?
Yes, but it takes longer.
How fast is the speed of gravity in mph?
According to Einstein's theory of relativity the speed of gravity is equal to the speed of light; i.e. about 671 million miles per hour. Note that this is still true in models for quantum gravity; there gravity is mediated by a massless particle and all massless particles have to travel at the speed of light.
Is energy produced when the particles of an object move very fast?
No, it is wrongly stated. Energy is not produced by moving fast. In fact, energy is not produced, it is transformed from other form of energy.The above question could be stated correctly as one of the followed.The particles or object that move very fast contain high kinetic energy.In throwing, the object absorb kinetic energy from our hand and travel very fast.
How does gravity affect an object in motion?
it pulls the object towards the earth which kind of slows it down i guess. or is that friction? For an object travelling in the Earths atmosphere, or near to the Earth above the atmosphere, gravity provides a force pulling the object towards the centre of the Earth. Unless the object is travelling fast enough, what is called the escape velocity, this gravity force will ultimately cause the object to fall back to the surface. Friction is something else, the friction with the air in the atmosphere also slows the object, but this force acts in opposition to the direction of motion, not towards the Earths centre. To compute the trajectory of the object you need to take both forces into account.
How can object appear to be weightless even when they are pulled by gravity?
That happens when an object is in "free fall". An acceleration will also produce the sensation of gravity; when in free fall, the two (gravity and acceleration) cancel what you feel. Another way of looking at it is that, if you are in a space capsule and stand on a balance, the balance falls (accelerates) towards the center of the Earth (or whatever attracts you) just as fast as you do - so your weight won't register on the balance.
How fast does something need to be to escape the gravity of a black hole?
In order to escape the gravity of a black hole, an object would have to travel faster than the speed of light - something that is impossible.
How fast do objects go in free fallouter space?
You can't fall in space, there is no gravity. An object will travel as fast as it is accelerated and continue at that speed forever as there is no air resistence to slow it down.
How do clouds defy gravity?
To say clouds defy gravity would be misleading, as they do not defy gravity. However rising air currents keep the clouds in the air. The air currents are stronger than the rate at which gravity makes the rain fall (which is not that fast). Clouds are so light, that even the smallest upward air current can make a clouds stay up. Rain falling is basically when the mass of the drops exceed the air currents.
Can a slow object travel as far as a fast object?
Yes, but it takes longer.
Why does a space shuttle have to travel so fast?
Space shuttles must travel at 11km/s so that they can escape the force of gravity. the force of gravity is approximately 9.81. If you don't travel at a greater speed than the force of gravity, the rocket will not launch.
When does the mass and or size of an object affect the time of its free fall?
if an object is lightr it will fall slower because gravity wont take it down as fast if it is heavier it will make the gravity pull it down faster
Can an object travel as fast as light?
No. If something could it would have to move about 700million mph. That's why it is hard to travel to other planets.
How do planes defy gravity?
They don't defy gravity. Gravitational attraction affects planes just like anything else. The wings of an aircraft generate lift which when the plane is going fast enough is a stronger force than the gravitational attraction of the earth. To do this the wings split the air flow going over it into an upper and lower part. Because the wing is curved it forces the air to travel further when it flows over the wing than when it flows under. The molecules of the air in the upper part are therefore slightly separated out from each other which creates a small vacuum effect. The wing rises to fill this vacuum pulling the aircraft up with it.
What is gaining of momentum?
When an object moves really fast it gains more mass because the centre of the object increases in density. This is why planets have such a large mass, because they travel so fast around the sun.
Why are the stars in a galaxy kept together even they travel very fast as they whirl around in space?
Even though they travel together they are kept in the galaxy by the galaxy's gravity, which is the combined gravity of all other stars, nebulae, and other matter in the galaxy.
Why are the stars in a galaxy kept together even if they travel very fast as they whirl around in space?
Even though they travel together they are kept in the galaxy by the galaxy's gravity, which is the combined gravity of all other stars, nebulae, and other matter in the galaxy.
Is it true that the thing that affects how fast it falls is the objects surface area?
Surface area is ONE thing that can affect how fast an object falls. Two forces determine how fast an object falls - the force of gravity and the opposing drag on the object from the medium it is falling through. In the case of an object falling in a vacuum, there is no drag so the object falls strictly according to the law of gravity. If an object is dropped through a fluid such as air or water, it can reach a terminal velocity where the force of gravity is exactly counterbalanced by the opposing drag on the object. In this case acceleration ceases - although motion does not. In other words, the object continues to fall, but it doesn't speed up. Drag force is a function of object velocity, viscosity of the fluid it is falling through, the surface area of the falling object, the surface roughness of the falling object, and the geometry of the falling object (spheres usually have less drag than cubes for example).
