explain that gravitational force is the dominant force determining motions in the solar system and in particular keeps the planets in orbit around the sun
Since this is not my area of expertise, I searched Google under the key words "gravity 'solar system' movement" to get these possible sources:
(Broken Link Removed)
http://en.wikibooks.org/wiki/Wikijunior_Solar_System/About_gravity,_mass,_and_weight
http://en.wikipedia.org/wiki/Solar_system
http://www.ctreg14.org/uploaded/faculty/npratt/8-3_science_unit.pdf
http://www.earthmatrix.com/sciencetoday/view_solar_system.html
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
I hope this helps. Thanks for asking.
I don't know what to say here. Of the forces known to exist in nature
gravity, electrical/magnetic, nuclear strong, and nuclear weak force, gravity is the only force possible.
If you were trying to explain planetary motion, then the orbits result because the force of gravity is just sufficient to change the motion of the planet to keep it in the same orbit. If it were less, the planet would hurl into space, if it were greater, the planet would fall into the Sun. The why of this is in the language of mathematics of Newtons's laws, and before him, Kepler's laws, and numerous Greeks who studied the laws and math of conic sections.
what are the role of the electrons in ionic bonds,covalent bonds and metallic bonds?
Sure! The dominant force that determines the motions in the solar system is the gravitational force. Gravity is the attractive force that exists between any two objects with mass. In the case of the solar system, the most significant gravitational force is between the sun and the planets.
Here's how you can understand why gravitational force is dominant in keeping the planets in orbit around the sun:
1. Newton's Law of Universal Gravitation: The first step is to understand Newton's law, which states that every particle of matter attracts every other particle with a force that is directly proportional to the product of their masses and is inversely proportional to the square of the distance between their centers.
2. Mass of the Sun: The sun is the most massive object in our solar system, containing about 99.86% of its total mass. Its enormous mass generates a strong gravitational force that pulls all the planets towards it.
3. Orbital Motion: The planets, such as Earth, have their own mass but significantly less than the sun. When they start moving in space, the sun's gravitational force acts as a centripetal force, constantly pulling the planets towards it.
4. Balance of Forces: The gravitational force provided by the sun's mass is perfectly balanced by the forward momentum of the planets, which keeps them in a stable orbit. This balance allows the planets to continuously revolve around the sun without falling into it or flying off into space.
In summary, the gravitational force exerted by the massive sun is the dominant force in the solar system, pulling the planets towards it and keeping them in their respective orbits. This delicate balance between gravitational force and the forward momentum of the planets is what enables their stable motion around the sun.