Minimum acceleration is the smallest change in velocity that can be detected by the human body. It is typically measured in meters per second squared (m/s²) or gravitational units (g).
The human body senses acceleration through the vestibular system, which is located in the inner ear. This system contains tiny hair cells that detect changes in motion and send signals to the brain.
The minimum acceleration that humans can feel varies from person to person, but it is generally accepted to be around 0.2 g. This means that a change in velocity of 0.2 meters per second squared can be detected by most people.
Yes, humans can sense acceleration in all directions. The vestibular system is able to detect changes in motion along the three axes of the body (up and down, left and right, and forward and backward).
As we age, the sensitivity of the vestibular system decreases, so older individuals may have a higher minimum acceleration threshold. Additionally, physical condition can also play a role, as athletes and individuals who are more physically fit may have a lower minimum acceleration threshold compared to those who are less active.