Definition

Examples

• 根据牛顿第三定律，每一个作用力都有一个相等的反作用力。
  Gēnjù Niúdùn dì sān dìnglǜ, měi yí gè zuòyònglì dōu yǒu yí gè xiāngděng de fǎn zuō.
  According to Newton's third law, every action force has an equal reaction force.
• 火箭飞行靠的是燃料燃烧产生的反作用力。
  Huǒjiàn fēixíng kào de shì ránliào ránshāo chǎnshēng de fǎn zuō.
  Rocket flight relies on the reaction force produced by fuel combustion.
• 走路时，脚给地面一个向后的力，地面就给脚一个向前的反作用力。
  Zǒulù shí, jiǎo gěi dìmiàn yí gè xiàng hòu de lì, dìmiàn jiù gěi jiǎo yí gè xiàng qián de fǎn zuō.
  When walking, your foot exerts a backward force on the ground, and the ground gives your foot a forward reaction force.