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The position of axis of rotation of a body is changed so that its moment of inertia decreases so that its moment of inertia decreases by The change in its radius of gyration is
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Question 1
A ballet dancer is rotating at angular velocity on smooth horizontal floor. The ballet dancer folds his body close to his axis of rotation by which his radius of gyration decreases by of his initial radius of gyration, his final angular velocity isQuestion 2
Two discs of moments of inertia and about their respective axes (normal to the disc and passing through the centre), and rotating with angular speeds and are brought into contact face to face with their axes of rotation coincident. (a) What is the angular speed of the two-disc system? (b) Show that the kinetic energy of the combined system is less than the sum of the initial kinetic energies of the two discs. How do you account for this loss in energy? Take .
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| Question Text | The position of axis of rotation of a body is changed so that its moment of inertia decreases so that its moment of inertia decreases by The change in its radius of gyration is |
| Answer Type | Video solution: 1 |
| Upvotes | 152 |
