kiihtymisellä

Kiihtymisellä (Finnish for "acceleration") refers to the rate of change of velocity of an object with respect to time. It is a vector quantity, meaning it has both magnitude and direction. In one-dimensional motion, acceleration is the change in velocity divided by the time taken to make that change. The SI unit for acceleration is meters per second squared (m/s²).

Acceleration can be positive or negative. Positive acceleration, also known as speeding up, occurs when an object's velocity increases over time. Negative acceleration, or slowing down, occurs when an object's velocity decreases over time. This is often referred to as deceleration.

In two or three-dimensional motion, acceleration can be broken down into components along each axis. The total acceleration is the vector sum of these components.

Acceleration is a fundamental concept in physics and is described by Newton's second law of motion, which states that the force acting on an object is equal to its mass times its acceleration (F = ma). This law is crucial in understanding the motion of objects under the influence of forces.

Kiihtymisellä is also a term used in the context of economic growth, where it refers to the rate at which an economy's output increases over time. This is often measured using the gross domestic product (GDP) growth rate.