satellite
DESCRIPTION
this contain all information on satellite and its types with examples.TRANSCRIPT
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SATELLITE
by
Nokesh
Prabhakar
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Satellite:- revolves around planet, Uniform velocity, fixed orbit
1.Artificial satellite
• Ex-polar satellite
2.Natural satellite
• Ex-moon
Satellite are of two types:-
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Natural Satellite:- A Natural Satellite is a Natural Body which revolves around(orbits) a Planet .It is usually called moon and is large and ball shaped.
There are 177 natural satellite in our solar system.
Mercury-0Venus-0Earth-1Jupiter-67Saturn-62Uranus-27Neptune-13Mars-2Pluto-5
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Artificial Satellite:-A Artificial Satellite is an object which has been placed into orbit by human endeavour.
Sputnik 1 –launched by Soviet union in 1957.
Artificial Satellite is of two types :-
1..Geostationary Satellite
2. Polar Satellite.
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Geostationary Satellite
1.Rotates around the Earth over equator2.Fixed over a particular place3.40,000 km above the Earth surface4.Time period is 24 hours5.Used in telecommunication
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Polar Satellite
1.Rotates around the Earth from pole to pole2.Rotate around the Earth 8-10 times per day3.Only 300-400 km above the earth surface4.Time period is 2-3 hours5.Used in weather broadcasting ,remote sensing and G.p.s
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Escape Velocity of a Satellite:- maximum speed to which a object is projected so that it moves out of gravitational field .
Luna 1
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The escape velocity of a satellite is
Location
with respect to
Ve[2] Locatio
n
with respect to
Ve[2]
on the Sun,
the Sun's gravity:
617.5 km/s
on Mercury,
Mercury's gravity:
4.3 km/s
at Mercury,
the Sun's gravity:
67.7 km/s
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on Earth,
the Earth's gravity:
11.2 km/s
at the Earth/Moon,
the Sun's gravity:
42.1 km/s
on the Moon,
the Moon's gravity:
2.4 km/s at the Moon,
the Earth's gravity:
1.4 km/s
on Mars, Mars' gravity: 5.0 km/s at Mars,
the Sun's gravity:
34.1 km/s
on Jupiter,
Jupiter's gravity:
59.5 km/s
at Jupiter,
the Sun's gravity:
18.5 km/s
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on Saturn,
Saturn's gravity:
35.6 km/s
at Saturn,
the Sun's gravity:
13.6 km/s
on Uranus,
Uranus' gravity:
21.2 km/s
at Uranus,
the Sun's gravity:
9.6 km/s
on Neptune,
Neptune's gravity:
23.6 km/s
at Neptune,
the Sun's gravity:
7.7 km/
on Pluto, Pluto's gravity: 1.2 km/s
in the Solar System,
the Milky Way's gravity: ≥ 525 km/s[3]
on the event horizon,
a black hole's gravity: = 299,792 km/s
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Orbital Velocity:- velocity at which an satellite rotates around a planet.
Orbital velocity of a satellite
Relation between orbital velocity and Escape velocity
=√gr
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Time Period of a satellite:- time taken by a satellite for 1 revolution.
The time period of a satellite
T=2∏r×√r √GM
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Height of a satellite:- the expression to find out height of satellite is
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Total Energy of a satellite :-Kinetic energy of a satellite=
Potential energy of a satellite=
Total energy of a satellite= K.E-P.E
GMm 2r
-GMm r =GMm -
GMm 2r r =-GMm 2r
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Kepler‘s law of Elliptical orbit
According to kepler’s 1st law the orbits of all planets are elliptical and sun remains at one of the focus
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Kepler’s law of aerial velocity
According to kepler’s 2nd law , a planet covers equal area in equal interval of time.
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Kepler’s law of time period
According to kepler’s 3rd law ,square of the time period is directly proportional to the cube of the semi-major axis.
T² r³