* Gravity is a constant force: The acceleration due to gravity (approximately 9.8 m/s²) is a constant near the Earth's surface. This means it doesn't change based on the object's motion.
* Air resistance can cause confusion: Air resistance can create the *illusion* that acceleration is different. As an object ascends, air resistance slows it down, making it seem like the acceleration is less than gravity. As it descends, air resistance can also slow it down, but it might feel like the acceleration is greater than gravity because the object is speeding up.
In a vacuum, with no air resistance, the acceleration due to gravity would be the same throughout the entire flight of the object, both ascending and descending.
