TOEFL 어휘

planet outside our solar system

외계 행성; 태양계 밖 행성

interaction that can change motion or shape

힘

part of structure transferring loads to ground

기초; 건축 기초

motion under gravity without other significant forces

자유 낙하 운동

number of repeated cycles per unit time

진동수; 주파수

contact force opposing relative sliding or its tendency

마찰력; 마찰

large gravitationally bound system of stars and other matter

은하

large planet composed mainly of hydrogen and helium

거대 가스 행성

toothed machine part transmitting motion

기어; 톱니바퀴

machine converting mechanical energy to electrical energy

발전기

gravitational interaction between physical bodies

중력; 인력

operated by liquid pressure or flow

액압의; 수력의

resistance to change in velocity

관성

limit electric current between objects or regions

절연하다; 절연 처리하다

material strongly limiting electric charge movement

절연체; 절연 재료

energy associated with motion

운동 에너지

optical component redirecting light by refraction

렌즈

rigid member turning about a pivot

지레

visible electromagnetic radiation

빛; 가시광선

distance light travels in vacuum in one year

광년

carrying structural forces in a design

하중을 지탱하는; 내력의

energy emitted by a celestial object per unit time

광도; 천체의 복사 출력

field describing magnetic influence in space

자기장

quantity measuring inertia of an object

질량

ratio of output force to input force

기계적 이득; 힘의 이득

sum of kinetic and potential energy

역학적 에너지

energy transfer by force along displacement

역학적 일

mass times velocity in classical mechanics

운동량

change of position relative to a reference

운동