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You say that the escape velocity is the one required to escape the earth's gravitational speed then we say the satellites stay in orbits because of the earth's gravitational speed how does that ha?
Wiki User
∙ 15y ago
Satellites are traveling at less than escape velocity.
(roughly, orbital velocity is about 7 tenths of escape).
Wiki User
∙ 15y ago
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What 2 ways causes an object's velocity to change?
If an object's speed changes, or it heads off in a new direction, its velocity has changed. Because of friction and gravity 1. acceleration 2. deceleration 3. change of direction
A satellite in an elliptical orbit travels at constant what?
If the path is perfectly circular, yes, the speed is constant. This should not be confused with the velocity, because while speed is constant, its direction is not; therefore velocity is always changing.
Both velocity and acceleration are vectors because?
Because it is defined that way. In common language, the words "speed" and "velocity" are used interchangeably. But in physics, if a vector quantity is desired, the word "velocity" is used; for a scalar quantity, the word "speed" is used.
What is the definition of final velocity?
Final velocity is the your last velocity traveled. Example if you travel 50m/s your final velocity is 50m/s because its the last velocity traveled, 0m/s is the initial velocity. Its not your total velocity because if u start running at 5m/s then accelerated 25m/s, your final velocity is NOT 30m/s. It is 25m/s. Also, your velocity change is 20m/s(25-5).
Is terminal velocity a type of friction?
No. Terminal velocity is a particular kind of velocity and friction is a particular kind of force. The terminal velocity of a falling object is the maximum velocity it can have because air resistance prevents it from going any faster. And air resistance is a type of friction. So terminal velocity is due to a type of friction.
How satellites stay in orbit?
The reason that satellites stay in orbit around Earth is because of two factors. Velocity and the gravitational pull between the satellite and the Earth.
What is the source of gravitational pull on the planets?
The gravitational pull on all the planets are artificial satellites because the satellites orbit all the planets!
How do forces affect the motion of satellites?
because the gravitational pull which is a force moves the satellites
Why doesn't gravity pull the artificial satellites to Earth?
Gravity pulls the satellites but the orbiting satellites don't fall down towards earth because the speed with which they move balances the gravitational force i.e. Centripetal force = Gravitational force.
Why are the planets considered satellites to the sun?
Because of gravity and all the pull (gravitational pull).
Why do objects that are thrown or shot follew a curved path?
Because the gravitational force from Earth will change the velocity.
How does terminal velocity involve balanced forces?
Terminal velocity is an example of balanced forced because the gravitational forces and the air resistance balance each other.
Why is the earths orbital velocity fastest at perihelion?
the suns gravitational pull is strongest because the earth is at its closest point to the sun.
How are the satellites able to float in mid air?
they do not float. They are spinning with a certain velocity. First of all the satellites when launched are propelled through air at a speed equal or greater than its escape velocity.They then have a certain linear velocity but are able to maintain a lunar synchronous orbit because of the earth's gravity.
Does escape velocity depend upon height from which it is projected?
Yes, it would. That's one reason why some artificial satellites were tossed into orbit after being carried up aboard the space shuttle. The reason is because escape velocity from Earth depends on Earth's gravity, which in turn depends on the distance from the Earth's center. The higher you go, the farther you are from the center of the planet, the less gravitational force there is between you and the Earth, and the smaller the escape velocity thus becomes.
How come the satellites don't come crashing to the earth because of its gravitational pull?
Because they have so much inertia that they continue to fall but miss the Earth due to their great speed.
How do artificial satellites stay in space?
They orbit the Earth because they experience a centripetal force due to the gravitational attraction between them and the Earth. Do you need more detail?
