For two forces to cancel, they must act on the same object.
举一反三
- In the following conclusions, ( ) is wrong. A: If the object displaces, it must deform at the same time. B: If there is no displacement at each point of the object, there must be no deformation. C: If the object deforms, there are always some points in the object to displace. D: The magnitude of the displacement depends on the deformation and constraint of the object.
- As long as two forces have the same magnitude and are in opposite directions, these two forces form a couple.
- As long as two forces have the same magnitude and are in opposite directions, these two forces form a couple. A: 正确 B: 错误
- Forces must exist between the object(物体) and the incline(斜面) that prevent the object from sliding.
- The same object must have same names in different languages.