the force your body invents to explain why it just slammed into the car door.
means a fictitious force introduced in an accelerating reference frame to make newton's laws look true even though nothing is actually pushing you.
from from physics' need to patch newton's laws when observers ride along in non-inertial frames; also called inertial or fictitious force, formalized as classical mechanics matured through euler and coriolis in the 18th-19th centuries.
centrifugal force — flings you outward on a spinning carousel, no rope needed
coriolis force — curves hurricanes and artillery shells across earth's rotating surface
euler force — jerks passengers when a rotating frame speeds up or slows
g force in elevators — presses you into the floor as the car accelerates upward