1Speed or pace — how fast something moves or progresses. A general-purpose word used for anything from vehicle speed to the pace of work.
この道路は速度制限が40キロだ。
The speed limit on this road is 40 km/h.
台風は速度を上げながら北へ進んでいる。
The typhoon is moving north, increasing its speed.
彼はタイピングの速度が誰よりも速い。
His typing speed is faster than anyone else's.
作業の速度を落とさずに正確さも保ちたい。
I want to keep working at speed without losing accuracy.
2In physics, velocity — a vector quantity that has both magnitude (speed) and direction.
速度は方向を持つ量なので、単なる速さとは区別される。
Velocity is a quantity with direction, so it's distinguished from mere speed.
ボールの初速度と角度から落下地点を計算した。
I calculated the landing point from the ball's initial velocity and angle.