Which of the following will not be affected if the radius of the sphere is increased while keeping mass constant?
1. | Moment of inertia | 2. | Angular momentum |
3. | Angular velocity | 4. | Rotational kinetic energy |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA solid sphere is rotating freely about its axis of symmetry in free space. The radius of the sphere is increased keeping its mass the same. Which of the following physical quantities would remain constant for the sphere?
1. | angular velocity |
2. | moment of inertia |
3. | rotational kinetic energy |
4. | angular momentum |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo discs of the same moment of inertia are rotating about their regular axis passing through centre and perpendicular to the plane of the disc with angular velocities \(\omega_1\) and \(\omega_2\). They are brought into contact face to face with their axis of rotation coinciding. The expression for loss of energy during this process is:
1. \(\frac{1}{4}I\left(\omega_1-\omega_2\right)^2\)
2. \(I\left(\omega_1-\omega_2\right)^2\)
3. \(\frac{1}{8}I\left(\omega_1-\omega_2\right)^2\)
4. \(\frac{1}{2}I\left(\omega_1-\omega_2\right)^2\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology