Sanny wrote:




When we throw a big Stone in air It will Fall Back on Earth.
Simmilarly For Sun Earth is just a piece of Rock? Who do this big rock
Earth Fall onto the Sun Just like the Stones which we throw in air
just come back and hit the Earth?

If your big rock had a tangential speed of over 18,000 miles an hour it
would not fall to earth. Consiser all those satillites in low orbit.
They are big rocks thrown by rockets.

In -Pricipia- Newton drew a diagram showing how a cannon could launch a
cannon ball that would orbit the earth without falling back to the
ground. (of course he ignored air friction to make the point).

For Sanny, it was as though Isaac Newton had never lived.

Bob Kolker

On Apr 27, 1:52*pm, "Robert J. Kolker" wrote:
Sanny wrote:

When we throw a big Stone in air It will Fall Back on Earth.
Simmilarly For Sun Earth is just a piece of Rock? Who do this big rock
Earth Fall onto the Sun Just like the Stones which we throw in air
just come back and hit the Earth?

If your big rock had a tangential speed of over 18,000 miles an hour it
would not fall to earth. *Consiser all those satillites in low orbit.
They are big rocks thrown by rockets.

In -Pricipia- Newton drew a diagram showing how a cannon could launch a
cannon ball that would orbit the earth without falling back to the
ground. (of course he ignored air friction to make the point).

For Sanny, it was as though Isaac Newton had never lived.

Bob Kolker

ever lasting orbiting around earth is possible if you put one
sattelite on height D and fire it tangentially with force F where |D|=|
F|. what is no force later becomes distance and what is now distance
later becomes anti-force and so the task is solved. there is no such
thing as a first, second or so cosmic speed. newton is new with this
lecture