Biologists and biomedical engineers are proposing to define the term "yank" for changes in force overtime, something that our muscles and nerves can feel and respond to.
What was the need for the new term?
- Their ideas were published on September 12 in the Journal of Experimental Biology.
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- Acceleration is the rate of change of velocity (or speed) with respect to time.
- In other words, acceleration is the time derivative of speed or velocity
- And the time derivative of acceleration is “jerk”.
- After that the time derivatives after jerk is described by the words, “snap”, “crackle” and “pop” for each successive derivative.
- Likewise, Force is a push or pull upon an object resulting from the object's interaction with another object.
- Force is measured in units of mass times acceleration.
- But the problem is that unlike velocity and acceleration, time derivatives for force have never been defined till now.
- That is why a new term ‘Yank’ has been proposed to fill the empty spot.
- ‘Yank’ could be useful in understanding spasticity, a common muscle impairment in multiple sclerosis, spinal cord injury, stroke, and cerebral palsy.
- Yank can also prove to be useful in the study of activities like jumping, sprinting, capturing prey and maintaining balance, etc.
- It is similarly useful in analyzing the behavior of muscles and tendons, sensory feedback and spinal reflexes, all the way down to the contributions of individual cells.