uniform motion
Physics term for motion at a constant speed in a straight line, or constant angular speed in circular motion.
In uniform motion, the velocity of the object is constant over time.
More specific term for uniform linear motion, while 等速運動 can also refer to uniform circular motion.
Motion with constant acceleration, as opposed to constant speed.
Compound of 等速 (constant speed) + 運動 (motion). A straightforward technical term.