KINES 300 Lecture Notes - Lecture 4: Potential Energy, Anatomical Terms Of Motion, Hyaline Cartilage

• School: American River College
• Department: Kinesiology
• Course: KINES 300
• Professor: Kiefer

Document Summary

Check the velocity to know if something is moving. Transfer of momentum: momentum can transfer from one object to another. When you move the femur, the pelvis moves. When you move the arm, the shoulder moves. This is why stabilization of joints is so important. To stop momentum of an object, you need to apply a force to the object over a period of time. In other words, you need to generate impulse. Mass*acceleration*time = force * time = impulse. Impulse can be used to both generate and break momentum. Work (j) = force * displacement (s) S = terminal position initial position. Work occurs when a force causes an object to move. Muscle work: can be positive, negative, or absent. Ex: elbow flexors generate force and the elbow is flexing. Ex: elbow flexors are generating force, but the elbow is extending. Ex: elbow flexors are generating force but the elbow is not moving at all.