## Physics – Rotational Motion – TEST (MCQs Maharashtra HSC Board)

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### #1. Before jumping in water from above, a swimmer bends his body to

### #2. The center of mass of a body

### #3. The diameter of a flywheel increase by 1%. The percentage increase in moment of inertia about its axis passing through the centre will be

### #4. The angular momentum of a system is conserved. If the net external

### #5. A mass is revolving in plane, then its angular momentum will be in the direction of

### #6. A particle performs uniform circular motion with an angular momentum L. if the frequency of particle’s motion is double and its kinetic energy is halved, the angular momentum becomes

### #7. A spherical solid ball is 1 kg mass and radius 3 cm is rotation about an axis passing through its centre with an angular velocity of 50 rad/s, the kinetic energy of rotation is

### #8. A homogeneous disc of mass 2 kg and radius 15 cm is rotating about its axis (which is fixed) with an angular velocity of 4 rad/s. The linear momentum of the disc is

### #9. Which of the following has largest moment of inertia?

### #10. When a steady torque is acting on a body, the body

### #11. Two circular iron discs are of the same thickness. The diameter of A is twice that of B. the moment of inertia of A as compared to that of B is

### #12. The radius of gyration of a body in independent of

### #13. Which of the following is an axial vector?

### #14. A solid cylinder of mass 20 kg rotates about its axis with angular speed 100 rds/s. The radius of the cylinder is 0.25 m. what is the kinetic energy associated with the rotation of the cylinder?

### #15. A hoop of radius 2 m weights 100 kg. It rolls along a horizontal floor so that its centre of mass has a speed of 20 cm/s. How much work is done to stop it?