机械效率是反映机械性能的物理量,它能够衡量机械做功的有效程度,机械效率越大,机械所做的有用功在总功中所占的比例越大,机械性能就越好.为了帮助同学们学习理解掌握《机械效率》,下面就此浅谈几点: Mechanical efficiency is the physical quantity reflecting the mechanical performance. It can measure the effective degree of mechanical work. The greater the mechanical efficiency, the greater the proportion of the useful work done by the machine in the total work, the better the mechanical performance. To help the students Learn to understand and master “mechanical efficiency”. Here are some points to talk about: