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Chapter 11: Q9Q (page 458)

Consider a rotating star far from other objects. Its rate of spin stays constant, and its axis of rotation keeps pointing in the same direction. Why?

Short Answer

Expert verified

The rate of spin stays constant, and its axis of rotation keeps pointing in the same direction due to the angular momentum.

Step by step solution

01

Definition of Angular Momentum.

The rotating inertia of an object or system of objects in motion about an axis that may or may not pass through the object or system is described by angular momentum.

02

Explanation about a rotating star far from other objects when its rate of spin stays constant.

The product of the moment of inertia and its angular velocity is known as angular momentum. Angular momentum can be divided into two types: translational and rotational. The centre of mass is used to determine rotational angular momentum, which is independent of the point of observation. The axis of rotation constantly points in the same direction because the centre of mass remains constant.

As a result of the angular momentum, the rate of spin remains constant, and the axis of rotation remains in the same direction.

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