题目
一道英语的物理题, 希望还能有翻译!谢谢
the difference between the useful energy transferred by the pulley system and the total energy supplied to the pulley system is called the.
a: effective energy
b: transferred energy
c: transformed energy
d: wasted energy
the difference between the useful energy transferred by the pulley system and the total energy supplied to the pulley system is called the.
a: effective energy
b: transferred energy
c: transformed energy
d: wasted energy
提问时间：2020-08-07
答案
D,题意大概是：对滑轮系统做的有用功和做的总功的不同（理解成差额）是什么,A 有用的功B 转移到能量C 转变形式的能 D 浪费掉的能 所以 差额肯定是浪费掉的,
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