In what way? surely there is no harm in Rocking chairs, literal (Hobby Horses), and use of playground equipment with a to-and-fro motion.
because it calms them down when they're upset or no reason
It can be a sign of sensory integration problems; however, it could also be a sign of an inner ear disorder. Sometimes children who have inner ear problems rock back and forth to reach equilibrium. Many children with autism have inner ear and balance issues.
The rhythm probably calms them.
Rocking back and forth when crying is a self-soothing mechanism that can help regulate emotions by providing a sense of comfort and security. The rhythmic movement can help release tension and calm the nervous system during moments of distress.
Rocking back and forth is a behavior that could indicate different things in different situations. It might be a coping mechanism for anxiety or stress, a stimming behavior for individuals with autism, or a way to self-soothe. It's important not to make assumptions or stigmatize behaviors without understanding the context.
because that baby could go to sleep
There is nothing to it! Just sit on it and rock back and forth!
Rocking back and forth can be a self-soothing coping mechanism for some blind individuals. It may help them regulate emotions, reduce anxiety, or provide a sense of comfort and stability in their surroundings. Additionally, it can help with orientation and mobility by giving feedback about the space around them.
Skittles!!
p-waves
If the motor is moving when you rock the car back and forth in park, it could be due to worn engine mounts that allow excessive movement of the engine. This movement can be transmitted through the drivetrain, leading to the motor shifting position. It is important to have the engine mounts inspected and replaced if necessary to prevent further damage.
Both. Rock is a type of music. A rock is also a part of the sediment of the earth. The verb to rock means to sway back and forth.
back and forth parallel to the direction of wave travel