KIN 3514 Ch 11

# KIN 3514 Ch 11 - Chapter11 AngularKinetics Objectives

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Chapter 11 Angular Kinetics

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Objectives Define torque and discuss the characteristics of a torque. State the angular analogs of Newton's three laws of motion and  their impact on human movement. Discuss the concept of moment of inertia. Understand the impact of angular momentum on human motion. Define the concept of center of mass. Calculate the segment center of mass and the total body center of  mass. Differentiate between the three classes of levers.
Objectives Discuss the relationships between torque, angular work,  rotational kinetic energy, and angular power. Define and conduct a static analysis on a single joint motion. Define stability and discuss its effect on human movement. Define and conduct a dynamic analysis on a single joint motion. Define the impulse-momentum relationship. Define the work-energy relationship.

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Angular Kinetics In Chapter 10, the point of application and line of application of a  force were discussed. If the line of application of the force does not pass through the  axis of rotation of an object, the object will rotate. This chapter deals with the causes of angular motion, hence  angular kinetics.
Torque or Moment of Force Characteristics of a Torque FIGURE 11-2 The z-axis is perpendicular to the x-y plane. In 2-D, torques act about the z- axis. A positive torque would appear to come out of the page while a negative torque would go into the page. is the perpendicular distance  from the line of action of a force to  the pivot point. The units of torque are Newton- meters (Nm). = r F Torque

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is the perpendicular distance  from the line of action of a force to  the pivot point. The units of torque are Newton- meters (Nm). = r F Torque FIGURE 11-3 When a force is applied, it causes no rotation if it is applied through the pivot point (A), or it generates a torque if the force is applied a distance from the axis (B and C). The moment arm (MA) is the perpendicular distance from the line of action of the force to the axis of rotation Pivot or axis of rotation. Torque or Moment of Force Characteristics of a Torque
through the pivot point (A), or it generates a torque if the force is applied a distance from the axis (B and C). The moment arm (MA) is the perpendicular distance from the line of action of the force to the axis of rotation Pivot or axis of rotation. Torque or Moment of Force

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## This note was uploaded on 12/07/2011 for the course KIN 3514 taught by Professor Lili during the Fall '09 term at LSU.

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KIN 3514 Ch 11 - Chapter11 AngularKinetics Objectives

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