关键词: 阿特伍德机, 滑轮, 牛顿第二定律, 动量定理

Abstract:

In Atwood’s machine, when both pulley and string have mass, the theoretical expressions of tension on both sides of the string and of acceleration of weight objects are derived using momentum theorem. The acceleration a(t) changing with time and the relationship between velocity v and moving distance h under different string weights are discussed.

Key words: Atwood’ s machine, pulley, Newton’ s second law, momentum theorem