Statics and Elasticity

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Statics and Elasticity
101110510113041011117Statics and ElasticityWe have seen that when an object is treated as a point mass, the condition that it be in equilibrium (that is, remain at rest or move in a straight line with constant speed) is that the net external force acting on it is zero. However, real objects are extended bodies that can rotate, and so we now continue our idea of equilibrium to encompass this possibility.
Rotational Equilibrium If the angular velocity of a rigid body is not to change, no net external torque can act on the object, since
Michael Browne: Schaum's Outline of Physics for Engineering and Science, Third Edition. Statics and Elasticity, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export