KIN 3514 Ch 10

KIN 3514 Ch 10 - Chapter 10 Linear Kinetics Objectives 1....

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Unformatted text preview: Chapter 10 Linear Kinetics Objectives 1. Define force and discuss the characteristics of a force. 2. Compose and resolve forces according to vector operations. 3. Discuss Newton's law of gravitation and how it affects human movement. 4. State Newton's three laws of motion and their relevance to human movement. 5. Differentiate between a contact and a noncontact force. 6. Discuss the six types of contact forces and how each affects human movement. 7. Represent the external forces acting on the human body on a free body diagram. Objectives 8. Define the impulse-momentum relationship. 9. Define the work-energy relationship. 10. Discuss the concepts of internal and external work. 11. Discuss the forces acting on an object as it moves along a curved path. 12. Discuss the relationships between force, pressure, work, energy, and power. 13. Discuss selected research studies that used a linear kinetic approach. Linear Kinetics Kinematics is the description of motion. Kinetics deals with the causes of motion. This chapter deals with the causes of translatory motion, hence linear kinetics. The concept of force is the basis for understanding linear kinetics. Force Force is a vector. Force is a push, pull, rub (friction), or blow (impact). Force causes or tends to cause motion (acceleration) or a change in shape of an object. Force vectors are usually drawn as arrows indicating direction and magnitude. Force Characteristics of a Force Vector (magnitude and direction) Angle Point of application Line of application Force vectors are usually drawn as arrows indicating direction and magnitude. FIGURE 10-1 Characteristics of a force for an internal muscular force (A) and an external force generated on the ground in the high jump (B). Force Characteristics of a Force FIGURE 10-2 Force vector addition. Force Composition and Resolution of a Force FIGURE 10-2 Force vector addition. Force Composition and Resolution of a Force Vector Horizontal Components Vertical Components A 7.07 7.07 B 5.00 0.00 C 4.33 2.50 D 0.00-7.00 Sum ( ) 16.40 2.57 Law of Motion Law I: Law of Inertia Every body continues in its state of rest or of uniform motion (constant velocity) in a straight line, unless it is compelled to change that state by external forces impressed upon it. If F = then v = The change of motion is proportional to the force impressed and is made in the direction of the straight line in which that force is impressed....
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KIN 3514 Ch 10 - Chapter 10 Linear Kinetics Objectives 1....

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