Here's why:
* Velocity: Describes the speed and direction of an object's movement.
* Acceleration: Describes the rate of change of velocity, which can be a change in speed, direction, or both.
Examples:
* A car turning a corner: The car's velocity is tangent to the curve, while the acceleration is towards the center of the circle, causing the car to change direction.
* A ball thrown upwards: As the ball goes up, velocity is upwards, but acceleration due to gravity is downwards. This causes the ball to slow down until it reaches its highest point.
* A projectile motion: A projectile launched at an angle experiences both horizontal and vertical motion. The horizontal velocity remains constant, but the vertical velocity changes due to gravity, leading to a curved trajectory.
Key Points:
* Non-uniform circular motion involves changes in both speed and direction.
* Curvilinear motion encompasses all movements that don't follow a straight line.
* When acceleration is perpendicular to velocity, it causes a change in direction only (like in uniform circular motion).
Let me know if you have any other questions!
