kinetics

/kɪˈnet.ɪks/ (bre, ipa) · /kɪˈnet̬.ɪks/ (ame, ipa) · /kə-ˈne-tiks also kī-/ (ame, mw)

kinetics — noun

1. the part of science that deals with how forces affect moving objects and how fas

1.名詞C1
釋義

the part of science that deals with how forces affect moving objects and how fast chemical reactions or other physical changes take place

例句

In Clara's physics class, students studied the kinetics of a ball rolling down a ramp.

uncountable noun used as subject

Chemical engineers use reaction kinetics to find the best temperature for making ammonia.

collocation: reaction kinetics

同義詞
  • dynamics

    broader term that covers both motion and the forces causing it; in physics, dynamics includes kinetics and statics as subfields

  • mechanics

    the entire branch of physics dealing with motion and forces; kinetics is one part of mechanics alongside kinematics and statics

反義詞
  • statics

    the branch of mechanics that studies objects at rest or in equilibrium, where forces balance rather than cause motion

用法筆記

Kinetics is an uncountable noun and takes a singular verb when referring to the field as a whole ('Kinetics is a branch of physics'). When paired with a preceding noun such as 'reaction' or 'enzyme' — forming 'reaction kinetics' — it still behaves as uncountable. Do not confuse with kinematics, which describes motion without reference to forces.

常見錯誤

❌Kinetics are an important branch of physics.
✅Kinetics is an important branch of physics.
💡kinetics is uncountable and takes a singular verb.
❌The kinetics of this reaction are very fast.
✅The kinetics of this reaction is very fast.
💡even with 'of this reaction', the subject remains kinetics (singular/uncountable).