Lecture 21
Wednesday 10/14/09
Chapter 10:1,2
Dynamics of Rotational Motion of a Rigid Body
•
Torque of a force about a point O:
-- The torque of the force is the effectiveness of the force in
causing an angular acceleration of the body
•
A net torque on a body produces an angular
acceleration of the body:
-- This is the rotational equivalent of Newton’s 2
nd
law
±
±
=
±
r
²
±
F
±
±
net
=
I
±
²

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