Linear Kinesematics Summary

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This week’s learning was about linear kinematics and angular kinematics. Kinematics itself, describes the appearance of motion. Linear kinematics involves the shape, form, patterns, and sequencing of linear movement through time, without particular reference to the forces that cause or result from the motion (Hall, 2011). Linear kinematics quantities we look at were: linear position, linear distance and displacement, linear speed and velocity and linear acceleration. Angular kinematics or rotation, involves volitional human movement which involves rotation of one or more body segments around the joints at which they articulate. During gait rotational motions taking place at the hip, knee, and ankle around imaginary mediolateral axes of rotation. …show more content…

The video looked at weight and height difference. The experiment was done with little league player Aaron Greenfiled. His throwing arm was measured at 30 inches long which was said to be 2.5 inches shorter than a major league pitcher’s throwing arm. They explained that shortening a level reduces the speed of rotation at the levers end, but regardless of that fact little league pitchers can still get their shoulder to rotate to angular velocities of above 2100 degrees per seconds. They can throw fast balls that max out beyond 70 miles per hour, which is only 20 miles per hour slower that a major league average. This video was interesting because I didn’t know players in the little league can throw that fast and even though they throw slower that the major league players. They went on explaining that the target for a little league player was actually smaller because of their height, so the overall target area shrinks. The bat of little league players are also shorter and narrower which reduce the “sweet spot” by 30 percent. The pitchers mount is 14.5 feet closer to the home plate in little league games than in the majors. This resulted in the little league batter has to react faster to hit a ball coming at them at 70 miles per hour fast ball. This intrigued me because they have to react faster than a major league player hitting a ball at 90 miles an hour fast ball. From

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