How does the Satellites are made to move exactly in circular orbit around the earth?
how many forces are used? what is their value?
This sound remarkably like homework. Check out the following link and see if you have any further questions.
This sounds remarkably like the thread you opened the other day, which was moved to General Questions and answered in detail.
And the same question that he asked two days ago: Motion Of Sattelite around the earth - Factual Questions - Straight Dope Message Board