| 释义 |
at·wood's machine
\ˈat.ˌwu̇dz-\ noun
Usage: usually capitalized A
Etymology: after George Atwood died 1807 English mathematician, its inventor
: an apparatus for demonstrating the laws of accelerated motion by means of a light nearly frictionless pulley wheel over which passes a thread having at its ends fairly heavy masses whose slight difference in weight is the cause of the acceleration |