1. Change in Direction: The object's path will curve. The acceleration acts to change the velocity vector, causing a change in the direction of motion.
2. Change in Speed: The speed might increase, decrease, or stay the same, depending on the angle between velocity and acceleration.
* Acceleration in the same direction as velocity: Speed increases.
* Acceleration in the opposite direction of velocity: Speed decreases.
* Acceleration perpendicular to velocity: Speed remains constant, but the direction changes.
Examples:
* Projectile Motion: A ball thrown horizontally. The initial velocity is horizontal, but the acceleration due to gravity is vertical. This results in a curved path (parabola).
* Circular Motion: A car driving in a circle at a constant speed. The velocity is constantly changing direction (tangential), while the acceleration is always pointing towards the center of the circle (centripetal).
* Curving a Baseball: A pitcher throws a curveball. The acceleration caused by the spin of the ball changes the direction of its path, making it curve.
Key Points:
* Velocity describes the rate of change of position, including both speed and direction.
* Acceleration describes the rate of change of velocity.
* If acceleration and velocity are not parallel, the object's motion will be a combination of changing speed and changing direction.
To visualize this:
* Imagine throwing a ball straight up. The ball's velocity is initially upwards. Gravity acts downwards (acceleration), slowing the ball down. Once the ball reaches its highest point, its velocity is zero, but acceleration due to gravity is still acting downwards, causing the ball to fall back down.
This interaction between velocity and acceleration is fundamental to understanding motion in physics.
