përshpejtimi

Përshpejtimi is the Albanian word for acceleration. In physics, acceleration is the rate at which an object's velocity changes over time. Velocity is a vector quantity, meaning it has both magnitude (speed) and direction. Therefore, acceleration occurs when an object's speed increases, decreases, or its direction of motion changes.

The standard unit of acceleration in the International System of Units (SI) is meters per second squared (m/s²). Mathematically, acceleration is defined as the change in velocity divided by the time interval over which that change occurs. If an object starts with an initial velocity (v₀) and reaches a final velocity (v) after a time (t), its average acceleration (a) can be calculated as a = (v - v₀) / t.

Acceleration can be positive, meaning the velocity is increasing in the direction of motion. It can also be negative, which is often referred to as deceleration, indicating that the velocity is decreasing. If an object is moving in a circle at a constant speed, it is still accelerating because its direction is constantly changing. This type of acceleration is called centripetal acceleration. Understanding acceleration is fundamental to comprehending motion, forces, and the laws of physics.