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If you imagine shooting a cannon at a horizontal level, you will see that the cannonball curves toward the Earth as it accelerates "downward" (i.e. toward Earth's surface.)
Now imagine this on a much bigger scale; as the object moves forward, it also get pulled down toward the Earth. Since the Earth itself is curved, the cannonball would never hit the ground. If it was going fast enough, it would simply fall into orbit.
For an illustration to accompany this, see:
http://upload.wikimedia.org/wikipedia/commons/7/73/Newton_Cannon.svg
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∙ 14y ago
Anonymous
Earths gravity
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What is the shape of the orbit when the velocity of the satellite is everywhere perpendicular to the force of gravity?
If the velocity of the satellite is always perpendicular to the force of gravity, then the eccentricity of the orbit is zero, and it's perfectly circular.
What will happen to time period of simple pendulum if taken to satellite?
A simple pendulum will not swing when it's aboard a satellite in orbit. While in orbit, the satellite and everything in it are falling, which produces a state of apparent zero gravity, and pendula don't swing without gravity.
Does gravitational field effect the satellite frequency?
No. Gravity effects its' orbit but not its' transmission frequency.
Why does objects stay in orbit?
Items, be they planets, moons or satellites, stay in orbit because they care carefully balanced between their inertia and the gravity of the primary object. They are freely falling - AROUND the primary.A satellite in low Earth orbit goes about 18,000 miles per hour in a direction tangent, or sideways, to the Earth's surface. Without gravity, it would fly off into space. It is continually falling toward the Earth. But because the satellite is moving sideways, by the time the satellite would have fallen to the ground, the satellite has already missed; it is along in its orbit, still falling, still traveling sideways to the Earth.
How does a rocket get out of earths orbit?
surely a rocket or artificial satellite can get out with help of escape velocity....
How is a satellite kept in orbit around the earth?
Gravity
How is a satellite maintained in orbit around earth?
gravity
What is the shape of the orbit when the velocity of the satellite is everywhere perpendicular to the force of gravity?
If the velocity of the satellite is always perpendicular to the force of gravity, then the eccentricity of the orbit is zero, and it's perfectly circular.
Gravity affects the speed of a satellite in an elliptical orbit?
Yes. Gravity affects EVERYTHING.
What is the force which keeps the satellite in orbit round the earth?
gravity
Does satellite has acceleration due to gravity or not?
yes, this ADG helps the satellite to orbit earth. This is the centripital force
What will happen to time period of simple pendulum if taken to satellite?
A simple pendulum will not swing when it's aboard a satellite in orbit. While in orbit, the satellite and everything in it are falling, which produces a state of apparent zero gravity, and pendula don't swing without gravity.
What force keeps satellite in orbit around the Earth?
There is only one main force acting on a satellite when it is in orbit, and that is the gravitational force.
What keeps a satellite in orbit around a planet?
It is not gravity because there is no gravity in space, only some on certain planets, deffiantly on earth. It is done by the strength from other planets the sun for instance. Heat waves. Some of the gravity in space does help keep the planets and satellites in orbit.
How does a satellite orbit earth?
Same way Luna (the moon) orbits Earth; gravity.
Does gravitational field effect the satellite frequency?
No. Gravity effects its' orbit but not its' transmission frequency.
How does hubble stay in orbit?
Any satellite is in a careful balance between gravity and inertia.
