Then there is no matter how is circle? when person is throwing a stone or moving stone along the circle then according to the tangent of any circle, stone is dropped. centripetal force and buoyancy force and upthrust this forces are produced

Forces Acting on the Stone in Circular Motion

When a stone is tied to a thread and a person rotates the thread continuously, the stone undergoes circular motion. In this scenario, several types of forces act on the stone.

1. Centripetal Force:
The centripetal force is the force that acts towards the center of the circular path and keeps the stone moving in a circular motion. In this case, the tension force in the thread acts as the centripetal force, as it pulls the stone towards the center of the circle.

2. Tension Force:
The tension force is the force transmitted through a string, rope, or any other flexible connector when it is pulled tight. In this scenario, the tension force in the thread provides the necessary centripetal force to keep the stone moving in a circular path.

3. Gravitational Force:
The gravitational force acts on the stone and pulls it towards the center of the Earth. However, in this context, the gravitational force does not directly affect the circular motion of the stone. It only adds to the overall weight of the stone.

4. Frictional Force:
If the stone is in contact with a surface while rotating, there may be a frictional force acting on it. This force opposes the motion and can limit the stone's speed or cause it to deviate from a perfect circular path. However, if the stone is suspended in the air with the thread, the frictional force can be neglected.

5. Air Resistance (Optional):
If the stone is rotating in the air, there may be a resistance force due to the air. This force, known as air resistance, opposes the motion of the stone and can affect its speed and path. However, for simplicity, air resistance is often neglected in basic circular motion problems.

Free Body Diagram (FBD) of the Stone:
To represent the forces acting on the stone in a visual manner, we can draw a Free Body Diagram (FBD). The FBD of the stone in this scenario would include the following forces:

- A vector representing the tension force in the thread acting towards the center of the circular path.
- A vector representing the gravitational force acting vertically downwards towards the center of the Earth (optional if the stone is suspended).

Overall, the stone experiences centripetal force provided by the tension force, while the gravitational force acts on it due to gravity. Other forces like friction or air resistance may be present depending on the specific scenario.