# Chapter 8: Angular Kinetics

### Chapter Objectives

After this chapter, you will be able to:

• State the first condition of equilibrium.
• Explain the difference between static equilibrium and dynamic equilibrium.
• State the second condition that is necessary to achieve equilibrium.
• Explain torque and the factors on which it depends.
• Describe the role of torque in rotational mechanics
• Explain the forces exerted by muscles.
• State how a bad posture causes back strain.
• Discuss the benefits of skeletal muscles attached close to joints.
• Discuss various complexities in the real system of muscles, bones, and joints.
• Calculate angular acceleration of an object.
• Observe the link between linear and angular acceleration.
• Observe the kinematics of rotational motion.
• Understand the relationship between force, mass and acceleration.
• Study the turning effect of force.
• Study the analogy between force and torque, mass and moment of inertia, and linear acceleration and angular acceleration. 