Kinesiology 3341A/B Lecture Notes - Lecture 6: Ground Reaction Force

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3341A/B
• Professor: Jim Dickey

Document Summary

You exert vertical action force and the ground pushes with equal magnitude back up on the foot (ground reaction force) When running, the foot comes down to the ground= downward vertical velocity and when the body is launched into the air= positive vertical velocity. *impulse is equal to the area underneath the force-time curve. The area underneath the curve is often the same during landing and taking off during running. Injury often happens when force spikes a small force is being applied, and then wen landing a large amount of force is applied over a very short period of time. Sand makes running very dif cult because it moves out of the way when force is applied to it= makes it very hard to generate enough force to take off quickly. Momentum: quantity of motion (p= mv mass x velocity) Increase momentum by increasing mass, or increasing velocity. How much force would it take to stop you .