What is equivalent substitution method?
In physics, for example, gravity and tension are equivalent to a resultant force, and many resistances are equivalent to a resistance, which makes solving problems more convenient
Several commonly used physics experiment methods in junior middle school
1、 Control variable method (CVM) refers to the research method of how to change only one of the physical quantities into several single physical quantities to affect a certain physical quantity when discussing the relationship between multiple physical quantities. This method is reflected in the table of experimental data as two experiments only
Explore the commonly used methods of junior high school physics experiment
The most important is the control variable