Answered: A child raises her arms to balance on a…

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter8: Rotational Equilibrium And Rotational Dynamics

Section8.5: Relationship Between Torque And Angular Acceleration

Problem 8.2QQ: A constant net torque is applied to an object. Which one of the following will not be constant? (a)...

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A child raises her arms to balance on a beam. The action makes it easier for her to balance because it...

a) decreases her moment of Inertia.

b) decreases her angular acceleration.

c) increases her angular velocity.

d) this action does nothing to her angular mechanics.

Explain.

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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