näennäisvoimien

Näennäisvoimat, or fictitious forces, are a concept in physics that appear in non-inertial reference frames. They are not real forces in the sense that they are not caused by the interaction between objects. Instead, they arise because the reference frame itself is accelerating. When an observer is in an accelerating frame, they perceive objects as if they are being acted upon by forces, even though from an inertial frame, the objects are simply moving in accordance with Newton's laws of motion.

The most common examples of fictitious forces include the centrifugal force, the Coriolis force, and the Euler force. The centrifugal force appears in rotating reference frames and is directed radially outward. For instance, an observer in a car accelerating around a curve feels pushed outward, which is a manifestation of the centrifugal force in their non-inertial frame. The Coriolis force also appears in rotating frames and acts perpendicular to both the velocity of the object and the axis of rotation. It is responsible for phenomena like the deflection of wind patterns and ocean currents on Earth. The Euler force arises when the angular velocity of a rotating reference frame changes.

Understanding fictitious forces is crucial for accurately describing motion in accelerated systems. While they don't represent fundamental interactions, they are essential tools for simplifying calculations and explaining observed phenomena within these specific reference frames. In essence, fictitious forces are a mathematical consequence of choosing a non-inertial frame of reference for analyzing physical events.