How far must you travel to get away from the earths gravitational field?
Gravity is an infinite force, so technically no matter how far you travel you will still be within the Earth's gravitational field. It's just the farther away you get the less the Earth's gravity affects you.
Gravitational pull?
I assume that you are a layperson and I will try to explain this in the least technical way. Gravity pulls objects together. The more mass an object has, the stronger the gravitational pull. The mass causes the gravity, pretty much. Since Earth is more massive than we are, we are attracted to the planet. According to Einstein, you can picture gravity like a bowling ball on a bed. From the weight of the bowling ball, the mattress sags, and creates a "well". Imagine the bed as the fabric of space and time. The "well" created by the bowling ball is shape of gravity. I you were to roll a baseball towards the bowling ball, it would be pulled towards the gravity well. We are pretty much standing at the bottom of that "well". The more massive the object, the more it bends the fabric of space and time. Now for the earth's spin. Think about the last time you went on one of those playground merry-go-rounds. If you get on, and someone spins it really fast, you feel like you are being pulled out of the merry-go-round. That is called centripetal force. Inertia (Newton's first law of motion) states that objects tend to stay at rest unless acted upon by an outside force. You're on the merry-go-round, and your body's inertia wants it to go forwards. But you hand on to the handles, keeping your body on the merry-go-round. Your body still wants to go straight, so you feel pulled out of the merry-go-round. That is the same principle for the earth's spinning. If there was no gravity, we would be flung off the face of the planet. Fortunately, the laws of physics exist, and the gravitational pull of a planet is generally stronger than the centripetal force of a planet. So gravity really pulls you down, not the earth's spin. Fun Fact: At a certain point in earth's vicinity, if you created a tether that stretched from the earth's surface way into space, and you rode a cable car up the tether, the centripetal force would overwhelm the decreasing gravity, and gravity on the cable car would be reversed!
What would happen if the sun loses its gravitational pull and the earth begins to fall?
Again, I am in the we would fly off tangentially from the point in orbit where the gravity ceased to be exerted group. The atmosphere would contract (that which we could keep) as the planet chills and would eventually freeze on the surface as core temperatures fall, much like an oversized comet. I am not sure we would get past the Kuiper Belt before our first collision. There are trillions of objects in the Oort Cloud we’d have to navigate. I would assume that new flight paths would ensue, and where we ended up would be serendipity. At that point mankind would be only a whisper in the past winds of the planet.
How can birds fly if gravity keeps us bound to the earth?
"Gravity doesn't keep us bound to the earth. Gravity is simply there to keep us from floating away." You are ironic. If it keeps us from floating away, isn't that the same thing as keeping us bounded? Come on kid, use your brain!
The moon (m=7.36E22 Kg) is bound to earth (m=5.98E24 Kg) by gravity.IF,...CHARGE??
The first thing to do is to calculate the amount of the gravitational force between the earth and the moon. You can use F = G m1 m2/r^2, but there is a cheat: the gravitational force equals the centrifugal force, since the moon is in orbit, so you can write F = m v^2/r, where v is the velocity of the moon in its orbit around the earth. (If you've eaten your Wheaties, calculate it both ways and verify that you get the same answer each way.) Next part: The electrostatic force between two charges is F = q1 q2/(4 pi e0 r^2). Let q1 = q2, and fill in the known values of eveything else. (Remember to convert units as necessary.) You'll need the following constants for all of this: Moon's orbital radius, 384400 km. Moon's orbital period, 27.321661 days. Electric constant e0 = 8.8541E-12 farads/meter. Universal gravitational constant G = 6.674E-11 m^3 kg^-1 sec^-2.
At the center of earth the gravity becomes zero. What would happen if gravity became infinite?
Gravity is not zero at zero at the center of the Earth. The value of ‘g’ is not applicable at its center as nothing can penetrate all layers of the Earth and can accelerate to its center. We can use the longer formula given by the great genius Isaac Newton to calculate the force of gravity at its center. We are familiar with the atmospheric pressure on its surface. Do we know this pressure is caused by what? By gravity. There is water pressure as we go down the ocean. This water pressure is also caused by gravity. As we go down towards its center the pressure of the rocks increases. This pressure is also caused by gravity. Gravity demands that the whole mass of the body be concentrated at its center. The force of gravity acts radially downwards towards its center. Now let us use that long formula:Fg= G*m1*m2 / d^2.m1 is mass of Earth. m2 is your mass. G is a constant. d is the radius of Earth. If you calculate the force of gravity on surface of Earth by using this long formula or short formula Fg=m*g, acting on your body, result will be the same. If you keep on going downwards , gravity acting on you keep on increasing. Your weight will keep on increasing. If you reach almost to its center, your weight could become almost infinite. Gravity is at its maximum at the center. You can check your self. This is why all objects in the Universe are spherical. Gravity begins from the center of the body and it decreases as you move away from its center.Singularity is a point where gravity is at its maximum. Every object in the Universe has ‘singularity’ at its center. If you use that longer formula, you will see that gravity increases as you go closure and closure to its center Why? m1 remains the same, m2 mass of rocks above the center increases and distance d approaches almost zero. Pressure at the very center is balanced , but it is not zero. This pressure is nothing but the force of gravity. Gravity is not zero at the center of the Earth. The force of gravity is a vector with direction and magnitude. It always acts radially towards the center of the object. Gravity from all atoms of the object points towards its center only, not other way around.