Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
When a diver bends his head before diving, what effect does it have on his moment of inertia?
When a diver bends his head before diving, what effect does it have on his moment of inertia?
- Increases his moment of inertia
- Causes erratic changes in his moment of inertia
- Decreases his moment of inertia (correct)
- Does not affect his moment of inertia
In the scenario of a stone tied to one end of a string being whirled in a horizontal plane with progressively increasing speed, why does the string break at some speed?
In the scenario of a stone tied to one end of a string being whirled in a horizontal plane with progressively increasing speed, why does the string break at some speed?
- The centripetal force is greater than the weight of the stone
- The required centripetal force is lesser than the tension in the string
- The required centripetal force is greater than the tension sustained by the string (correct)
- Gravitational forces of the earth is greater than the tension in string
Under what condition is the angular momentum of a system of particles conserved?
Under what condition is the angular momentum of a system of particles conserved?
- When no external force acts upon the system
- When axis of rotation remains the same
- When no external torque acts upon the system (correct)
- When no external impulse acts upon the system
Flashcards are hidden until you start studying
Study Notes
Moment of Inertia
- When a diver bends his head before diving, his moment of inertia decreases, making him more compact and allowing for faster rotation.
Rotational Motion
- As the speed of the whirled stone increases, the centripetal force required to keep the stone moving in a circular path also increases.
- The string breaks when the centripetal force exceeds the maximum tension it can withstand, causing it to snap.
Conservation of Angular Momentum
- The angular momentum of a system of particles is conserved when the net torque acting on the system is zero, meaning the system is not experiencing any external rotational force.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
