SOLAR SYSTEM

Detailed explanation-1: -If the distance between two objects increases, the gravitational force between the objects will increase.

Detailed explanation-2: -This orbit requires little velocity to maintain its position because at this distance there is very little gravitational pull from the Earth. The closer satellites are to Earth the more likely it is that they will run into traces of Earth’s atmosphere which create drag.

Detailed explanation-3: -The satellite could be knocked or moved closer or farther from the object it is orbiting. If it moved closer, gravity would pull more strongly, if it moved farther, gravity would have less of a pull. The satellite could dip into the atmosphere of a planet and be slowed by that.

Detailed explanation-4: -Gravity-combined with the satellite’s momentum from its launch into space-cause the satellite to go into orbit above Earth, instead of falling back down to the ground.

Detailed explanation-5: -The satellite is revolving around earth because the centripetal force is balanced by earth’s gravitational pull. If the gravitational pull disappears, the satellite free of centripetal force. So, it will travel with its instantaneous velocity i.e. in the direction tangential to the circular path.

Detailed explanation-6: -In the absence of a centripetal force, the satellite will move tangentially in the original orbit with the instantaneous velocity of the satellite before the force of gravity becomes zero. Thus the satellite will move tangentially and run away from its orbit.

Detailed explanation-7: -As a satellite moves around the Earth in a circular orbit, the direction of the force of gravity is always towards the centre of the Earth. However, if the satellite is given speed in any direction horizontal to the surface of the Earth, it will travel further before it hits the Earth.