Question

Q4 What keeps the earth in its orbit as it
goes round the sun​

Answer 1

all objects attract one another, including Earth and the Sun. The force of this attraction—or gravitational pull—depends on the size of the objects. As the Sun is very large, it exrrts a great gravitational force on Earth.

Answer 2

Answer: The Sun's Gravity

Explanation:The Earth is "falling" around the Sun. The Earth has some initial momentum - it is moving in a direction, which is perpendicular to the direction of the Sun from the Earth. The Sun's gravity is enough to keep the Earth from flying off in a straight line, away from the Sun, but not enough to bring the Earth closer in - the Earth is continually changing its direction of movement, but in such a way that it follows a nearly circular path around the Sun.

If the Sun's gravity were stronger, it would pull the Earth in closer, but then the angle between the Earth's motion would also be changing more rapidly, so it would continue revolving around the Sun.

This concept is called the conservation of angular momentum, which is one of the basic principles of physics.