noun
Technical term used in physics and engineering; often interchangeable with 速度 (そくど) but carries a more formal or scientific tone.
この実験では、物体の速力度を正確に測定する必要がある。
In this experiment, it is necessary to accurately measure the velocity of the object.
速力度と速度は、物理学では厳密には異なる概念だ。
In physics, speed and velocity are strictly different concepts.