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Conservation of angular momentum is used to explain why which body keeps spinning?
AThe Earth itself
BThe Sun only
CThe Moon only
DA falling stone
Answer & Solution
Correct answer: A. The Earth itself
1. The conservation law has an astronomical illustration.
2. Angular momentum is conserved when no net external torque acts.
3. Conservation of angular momentum is introduced directly.
4. We can now understand why Earth keeps on spinning.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 10 'Rotational Motion and Angular Momentum', sections 10.1-10.7_
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