Chapter 10: Rotational Kinematics and Energy Reference Tools & Resources

Reference Tools & Resources

I. Key Terms and Phrases

angular position: the angle measured from a chosen reference line.

angular velocity: the rate of change of angular position.

angular acceleration: the rate of change of angular velocity.

rolling without slipping: a form of rolling motion in which the point of contact between the wheel and the surface is instantaneously at rest.

moment of inertia: a quantity that represents the inertial property of a rotating object or system.

II. Important Equations

Name/Topic	Equation	Explanation
angular velocity		The average angular velocity of a rotating object.
angular acceleration		The average angular acceleration of a rotating object.
constant angular acceleration		The system of equations that describe motion with constant angular acceleration.
linear quantities	s = rq vt = rw at = ra acp = rw2	The 4 equations that relate the linear and angular quantities in rotational motion.
rotational kinetic energy		The rotational kinetic energy of a system.
moment of inertia		The expression for the moment of inertial of a system of particles.

III. Know Your Units

Quantity	Dimension	SI Unit
angular position	--	rad
angular velocity	[T-1]	rad/s
angular acceleration	[T-2]	rad/s2
moment of inertia

Reference Tools and Resources by David Reid, Eastern Michigan University. ©2002 by Prentice Hall, Inc.

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