BPK 142 Lecture Notes - Lecture 4: Erector Spinae Muscles, Spinal Disc Herniation, Shear Force

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 142
• Professor: Craig Asmundson

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. Mass the quantity of matter contained in an object. Weight the amount of gravitational force exerted on a body. Weight = mass x acceleration of gravity = mag. If a person has a mass of 80 kg, his weight = (80 kg) (9. 81 m/s2) = 785 n. Torque the product of force and the perpendicular distance from the force"s line of action to the axis of rotation. It may be thought of as rotary force. Moment arm the perpendicular distance between the force"s line of action and the axis of rotation. Mechanical advantage of a lever the ratio of force arm length to resistance arm length. Volume the amount of space that a body occupies. Pressure force distributed over a given area.