Physics Assignment Help With Motion of Planets and Satellites

6.6 Motion of Planets and Satellites

6.6.1 Kepler's Law's

Kepler's laws of planetary motion. These are :

(i) The Law of Orbits: All planets move in elliptical orbits with the sun at one focus.

(ii) The law of Areas: A line that connects a planet to the sun sweeps out equal areas in equal time, i.e., the aerial velocity of the planet is always constant. [This law is based on conversation of angular momentum)

(iii) The Law of Periods: The square of the period of revolution of any planet around the sum is proportional to the cube of the semi-major axis of the orbit, of planet i.e., T2 µ r3.

6.6.2 Orbital Velocity

Velocity given to a satellite in order to keep it in orbit is known as orbital velocity (V0). The necessary centripetal force needed for circular motion is provided by the gravitational attraction between earth of mass Me and satellite of mass m.

gravitation help

The orbital velocity of a mass m at a height ‘h’ above the surface of earth is

motion of planets and satellites

Also the law of orbits the law of periods

If the satellite is very near to the surface of earth, then h = 0

So, orbital velocity

In case of earth physics online tutoring

6.6.3 Time Period

The time taken by a planet in completing one revolution is its time period T. In one revolution it covers a a at speedplinear distance of 2 v. Thus,

high school physics physics experiments2 online tutoring

or, physics online tutor(Kepler’s Third laws)

6.6.4 Energy

The kinetic energy of the planet is

Physics Assignment Help ( physics tutors )

physics homework Help2

The gravitational potential energy of the sun-planet system is

physics-tutor2(where M is the mass of sun and m is the mass of planet)

The total mechanical energy of the sun-planet system is

physics help

The total energy is negative. This is true for any bound system if the potential energy is taken to be zero at infinite separation.

Regarding the velocity of projection of a body following cases may be considered:

Velocity Trajectory

1.V < V0 Body does not orbit the Earth. It is falls

physics projectsback on the Earth's surface.

2. physics problemsCircular path

3. V0 < V < Ve Elliptical path

4. V = Ve Parabolic path

5. V > Ve Hyperbolic path

The net velocity where V0 ® orbital velocity

physics online help Ve ® escape velocity

Email Based Assignment Help in Motion of Planets and Satellites

We are the leading online Assignment Help provider. Find answers to all of your doubts regarding the Motion of Planets and Satellites. provide homework, Assignment Help to the school, college or university level students. Our expert online tutors are available to help you in Motion of Planets and Satellites. Our service is focused on: time delivery, superior quality, creativity and originality.

To submit physics Motion of Planets and Satellites assignment click here

Following are some of the areas in physics Gravitation which we provide help:

Gravitation Help | Physics Online Tutor | Physics Assignment Help | Physics Tutors | Physics Homework Help | Physics Tutor | Physics Help | Physics Projects | Physics Problems | Physics Online Help | Physics Online Tutoring | High School Physics | Homework Tutor | Physics Experiments | Online Tutoring