BPK 142 Lecture Notes - Lecture 8: Erector Spinae Muscles, Spinal Disc Herniation, Heavy Object
15 Mar 2016
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Document Summary
Qualitative analysis - a non-numerical description of a movement based on direct observation. Quantitative analysis - a movement is analyzed numerically based on measurements from data collected during the performance of the movement. Weight the amount of gravitational force exerted on body. Weight = mass x acceleration of gravity = mag. If a person has a mass of 80kg, his weight = (80kg)(9. 81 m/s^2) = 785n. Torque the product of force and the perpendicular distance from the force"s line of action to the axis of rotation. It may be though of as rotary force unit = newton-meter (nm) Movement arm the perpendicular distance between the force"s line of action and the axis rotation. Mechanical advantage of a lever ratio of force arm length to resistance arm length. Volume the mount of space that a body occupies. Compression pressing or squeezing force directly axially through a body. Tension pulling or stretching force directly axially through a body.
