përshpejtia

Përshpejtia, derived from the Albanian word for acceleration, refers to the rate at which an object's velocity changes. Velocity is a vector quantity, meaning it has both magnitude (speed) and direction. Therefore, acceleration can occur if the speed of an object increases, decreases, or if its direction of motion changes.

In physics, acceleration is typically denoted by the symbol 'a' and is measured in meters per second squared (m/s²) in the International System of Units (SI). The fundamental relationship between acceleration, force, and mass is described by Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass (F = ma).

Constant acceleration is a simplified scenario where the acceleration remains the same over a period of time. This condition allows for the use of specific kinematic equations to describe an object's motion. Non-uniform acceleration, on the other hand, occurs when the acceleration changes, requiring more complex mathematical methods for analysis.

Examples of acceleration in everyday life include a car speeding up from a stoplight, a ball being thrown upwards and slowing down due to gravity before falling back down, or a satellite orbiting the Earth, constantly changing its direction of motion. Understanding acceleration is crucial for analyzing and predicting the motion of objects in various physical contexts.