- 高速度 gāosùdù high speedhigh speed; high velocity
- 加速度 jiāsùdù accelerationthe rate at which an object changes its velocity over time; common units include meters per second squared (m/s²) and centimeters per second squared (cm/s²)
- 重力加速度 zhònglìjiāsùdù gravitational acceleration(physics) the acceleration of an object in free fall within a vacuum caused by the force of gravity
- 角速度 jiǎosùdù angular velocityThe rate of change of an angle with respect to time for an object in rotational motion; typically measured in radians per second or degrees per second.
- 线速度 xiànsùdù linear velocityThe velocity of an object moving along a path, specifically used in physics to describe the speed of a point on a rotating or moving body.
- 速度计 sùdùjì speedometerinstrument for measuring the speed of a vehicle; speedometer; dromometer
- 瞬时速度 shùnshísùdù instantaneous velocitythe speed and direction of an object at a specific moment in time or at a specific point in its path during non-uniform motion
- 切向速度 qiēxiàngsùdù tangential velocity
- 旋转角速度 xuánzhuǎnjiǎosùdù rotational angular velocity
- 放慢速度 fàngmànsùdù to slow down; to decelerateTo ease up the pace; to slow things down
- 逃逸速度 táoyìsùdù escape velocityThe minimum speed needed for an object to break free from the gravitational attraction of a massive body.
- 减低速度 jiǎndīsùdù to slow downTo lower or slacken speed; to decelerate or retard
- 速度滑冰 sùdùhuábīng speed skatingA winter sport where athletes compete by skating across ice for speed, including short, middle, and long distance races; often shortened to [[速滑|速滑|su4 hua2]].
- 年增长速度 niánzēngzhǎngsùdù annual growth rateannual rate of growth; used in economic contexts
- 宇宙速度 yǔzhòusùdù cosmic velocityThe minimum velocity required for a spacecraft to reach orbit or escape the gravitational pull of a celestial body, often categorized as first, second, or third cosmic velocity.
- 恒加速度 héngjiāsùdù constant acceleration
