What universal force is primarily responsible for keeping satellite in orbit around earth? Answers are electromagnetic force, strong nuclear force, gravitational force, weak nuclear force. Thank you

F = G M m / r^2 = m a = m v^2/r

in other words
gravitational force equals mass times centripetal acceleration.

The universal force primarily responsible for keeping satellites in orbit around the Earth is the gravitational force. To understand why, let's break it down step-by-step:

1. Satellites, just like any other object, experience a force called gravity due to the presence of Earth. Gravity is an attractive force that pulls objects toward each other.

2. Newton's law of universal gravitation states that the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

3. When a satellite is in orbit around the Earth, it is constantly falling towards the Earth due to gravity. However, it also possesses a sufficient tangential velocity (sideways velocity) that allows it to keep missing the Earth and continuously fall around it.

4. This type of orbit is called a stable orbit or a gravitational orbit. The satellite's tangential velocity balances the gravitational force, causing it to continuously fall but also continually miss the Earth.

5. The gravitational force is the dominant force in this scenario because its strength depends on the masses of the objects involved. While the other forces, such as electromagnetic force and the nuclear forces, are essential in other contexts, they play a negligible role in the orbit of satellites around the Earth.

So, in summary, the gravitational force is the primary universal force responsible for keeping satellites in orbit around the Earth.