Vertical Velocity:
* Constant Acceleration: Gravity exerts a constant downward acceleration (approximately 9.8 m/s²) on the projectile. This means the vertical velocity continuously increases in the downward direction.
* Initial Vertical Velocity: The initial vertical velocity of the projectile determines how high it will go. If launched upwards, gravity will slow it down until it momentarily stops at its highest point. Then, gravity will accelerate it back downwards.
* Symmetry: The time it takes for a projectile to reach its highest point is the same as the time it takes to fall back down to its initial height.
Horizontal Velocity:
* Constant Velocity: In the absence of air resistance, gravity has *no* effect on the horizontal velocity of a projectile. This is because gravity acts strictly downwards.
* Uniform Motion: The horizontal velocity remains constant throughout the projectile's flight.
Key Points:
* Independence of Motion: The horizontal and vertical components of projectile motion are independent of each other. Changes in vertical velocity due to gravity do not affect the horizontal velocity.
* Parabolic Trajectory: The combination of constant horizontal velocity and accelerating vertical velocity results in a parabolic trajectory for most projectiles (ignoring air resistance).
Example:
Imagine throwing a ball horizontally. The ball will travel forward at a constant speed, but gravity will simultaneously pull it downwards. The ball will trace a curved path (a parabola) as it falls.
Air Resistance:
In reality, air resistance can influence both horizontal and vertical velocities. Air resistance creates a force that opposes the projectile's motion, slowing it down in both directions.
Let me know if you'd like a more detailed explanation of any specific aspect of projectile motion!
