Posted by: twanke September 10, 2008
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First of all, there is gravitational force. Its just too weak relative to other forces.
Secondly, if you can prove there is only one force, you will be awarded Nobel Prize for Physics right away. Einstein spend his last 10- 15 years trying to unify the four fundamental forces of nature: gravitational, electromagnetic, the strong nuclear and the weak nuclear force. Three forces have been unified except for gravity. If you can prove your statement "There is only one mother force, which is electromagnetic force. It shows different nature in different state and form", you will be declared the greatest mind of all time. So, good luck.
Lastly, when you say 'height' or 'distance', I suppose you are referring to frame of reference. Although physical quantities including 'mass' don't DEPEND on what you call 'height' but yes, you can get a different result measuring/observing from different frame of reference. This is one of the core of Theory of Relativity.
Secondly, if you can prove there is only one force, you will be awarded Nobel Prize for Physics right away. Einstein spend his last 10- 15 years trying to unify the four fundamental forces of nature: gravitational, electromagnetic, the strong nuclear and the weak nuclear force. Three forces have been unified except for gravity. If you can prove your statement "There is only one mother force, which is electromagnetic force. It shows different nature in different state and form", you will be declared the greatest mind of all time. So, good luck.
Lastly, when you say 'height' or 'distance', I suppose you are referring to frame of reference. Although physical quantities including 'mass' don't DEPEND on what you call 'height' but yes, you can get a different result measuring/observing from different frame of reference. This is one of the core of Theory of Relativity.