The Action Force:
* Gravity: The Earth exerts a downward gravitational force on the object. This is the force that causes the object to fall.
The Reaction Force:
* The Object's Gravitational Pull on Earth: This is often overlooked, but according to Newton's Third Law, the object also exerts an equal and opposite force on the Earth. This force is incredibly small because the object's mass is tiny compared to Earth's.
Important Considerations:
* Vacuum: In a vacuum, there is no air resistance. This means the only force acting on the object is gravity.
* No Air Resistance: Without air resistance, the object accelerates constantly downwards due to gravity.
In Summary:
The action-reaction forces in a falling object in a vacuum are:
* Action: Earth's gravitational pull on the object.
* Reaction: The object's gravitational pull on the Earth.
Let me know if you'd like more details about the concepts involved!
