Satellite:- revolves around planet, Uniform velocity, fixed orbit Satellite are of two types:- 1.Artificial satellite •Ex-polar satellite 2.Natural satellite •Ex-moon
Natural Satellite:- A Natural Satellite is a Natural Body which revolvesaround(orbits) a Planet .It is usually called moon and islarge and ball shaped.There are 177 natural satellite in our solar system. Mercury-0 Venus-0 Earth-1 Jupiter-67 Saturn-62 Uranus-27 Neptune-13 Mars-2 Pluto-5
Artificial Satellite:-A Artificial Satellite is an object which has been placedinto orbit by human endeavour.Sputnik 1 –launched by Soviet union in 1957.Artificial Satellite is of two types :-1..Geostationary Satellite2. Polar Satellite.
Geostationary Satellite1.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
Polar Satellite1.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
Escape Velocity of a Satellite:- maximumspeed to which a object is projected so that itmoves out of gravitational field .Luna 1
The escape velocity of a satellite is with withLocatio Locatio respect Ve respect Ven n to toon the 617.5 kthe Sun Suns m/s, gravity: Mercury at theon Merc 4.3 km/ 67.7 km s Mercury Sunsury, s /s gravity: , gravity:
the at the 11.2 km/ the Suns 42.1 km/on Earth, Earths Earth/Mo s gravity: s gravity: on,on the the at thethe Moon Moons 2.4 km/s Earths 1.4 km/s Moon,, gravity: gravity: Mars the Suns 34.1 km/on Mars, 5.0 km/s at Mars, gravity: gravity: son Jupite Jupiters 59.5 km/ at the Suns 18.5 km/r, gravity: s Jupiter, gravity: s
on Satur Saturns 35.6 km at the Suns 13.6 kmn, gravity: /s Saturn, gravity: /son Uran Uranus 21.2 km at the Suns 9.6 km/us, gravity: /s Uranus, gravity: s Neptune aton Nept 23.6 km the Suns s Neptune 7.7 km/une, /s gravity: gravity: ,on Pluto, Plutos gravity: 1.2 km/s the Milky Waysin the Solar System, ≥ 525 km/s gravity: a black holeson the event horizon, = 299,792 km/s gravity:
Orbital Velocity:- velocity at which ansatellite rotates around a planet.Orbital velocity of a satellite =√grRelation between orbital velocity and Escapevelocity
Time Period of a satellite:- timetaken by a satellite for 1 revolution.The time period of a satellite T=2∏r×√r √GM
Height of a satellite:- theexpression to find out height ofsatellite is
Total Energy of a satellite :-Kinetic energy of a satellite= GMm 2rPotential energy of a satellite= -GMm rTotal energy of a satellite= K.E-P.E =GMm - GMm 2r r =-GMm 2r
Kepler‘s law of Elliptical orbitAccording to kepler’s 1st law the orbits of all planetsare elliptical and sun remains at one of the focus
Kepler’s law of aerial velocityAccording to kepler’s 2nd law , a planetcovers equal area in equal interval of time.
Kepler’s law of time periodAccording to kepler’s 3rd law ,square of thetime period is directly proportional to thecube of the semi-major axis. T² r³