* Horizontal velocity: The horizontal velocity of the projectile remains constant throughout its flight. This is because there is no horizontal force acting on the projectile (assuming no air resistance).
* Horizontal acceleration: The horizontal acceleration of the projectile is always zero.
* Vertical acceleration: The vertical acceleration of the projectile is always constant and equal to the acceleration due to gravity (g), which is approximately -9.8 m/s².
It's important to note:
* Air resistance: In reality, air resistance does affect projectile motion. This will cause the horizontal velocity to decrease over time, making the horizontal acceleration non-zero.
* Other forces: Other forces besides gravity can act on a projectile, such as wind, which will also affect the trajectory and cause the quantities mentioned above to change.
Therefore, the constancy of these quantities is a simplification based on the assumption of ideal conditions (no air resistance, only gravity acting on the projectile).
