Angular Position To describe the rotation of a rigid body about a fixed axis, called the rotation axis, we assume a reference line is fixed in the body, perpendicular to that axis and rotating with the body.

Angular Velocity and Speed If a body rotates through an angular displacement 6. (}in a time interval t:.t, its average angular velocity.

The Kinematic Equations for Constant Angular Acceleration Constant angular acceleration (a = constant) is an important special case of rotational motion.

Linear and Angular Variables Related A point in a rigid rotating body, at a perpendicular distance r from the rotation axis, moves in a circle with radius.

The Parallel-Axis Theorem The parallel-axis theorem relates the rotational inertia J of a body about any axis to that of the same body about a parallel axis through the center of mass.

Torque Torque is a turning or twisting action on a body about a rotation axis due to a force F. If F is exerted at a point given by the position vector r relative.

Newton’s Second Law in Angular Form The rotational analog of Newton’s second law is
where is the net torque acting on a particle or rigid body. the rotational inertia of the particle.

Work and Rotational Kinetic Energy The equations used for calculating work and power in rotational motion correspond to equations used for transnational motion.

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