Muscle contractions have Increased force at slower shortening velocity compared to higher shortening velocity.
Velocity is the rate of change in direction of an item in motion as it is measured by a certain standard of time and viewed from a specific point of reference (for example, 60 km/h northbound). A key idea in kinematics, the area of classical mechanics that studies how bodies move, is velocity.
The definition of velocity requires both its magnitude and its direction because it is a physical vector quantity. Speed is a coherently derived unit that is measured in the SI (metric system) as metres per second (m/s or m/s1). Speed is the scalar absolute value (magnitude) of velocity.
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