Kinesiology 3341A/B Lecture Notes - Lecture 9: Triceps Brachii Muscle, Heart Rate, Greater Trochanter

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

Document Summary

Distance and the force have to be in the same direction. As (cid:455)ou"re pou(cid:374)di(cid:374)g up stairs, c0m is the sa(cid:373)e as (cid:373)ovi(cid:374)g bo(cid:454), but bod(cid:455) is doi(cid:374)g differe(cid:374)t. The accerlerationa and force will be changfinf over time. On avg you could draw average force that is constatnt and have the same area under the curce as the changing force over time. Work is sequal area under displacement curce. If the force is changing, you need to look at it underneath. The work done to lift the bar would different height. Exerting a moment and it is causng rotation. As you move throughvarch, the force maps through it: foce and displacements are in the same firection. Distance (m) = r (m) and angle (rad) If holding you have moment (muscle force), no angle, no work. Isometric contractions: muscle is contracting but neither shortening or lengthening: no external work, e. g. like pushing on a wall.