1. | The torque acting is 2000 Nm with an angular acceleration of 2 rad/s2. The moment of inertia of body is (MH-CET 2004) (a) 1200 kgm2 (b) 900 kgm2 (c) 1000 kgm2 (d) Can’t say Answer: (c)
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2. | By keeping moment of inertia of a body is constant, if we double the time period, then angular momentum of body – (MH-CET 2005) (a) Remains constant (b) Doubles (c) Becomes half (d) Quadruples Answer: (c) |
3. | A disc of moment of inertia I1 is rotating with angular velocity w1 about an axis perpendicular to its plane and passing through its centre. If another disc of moment of inertia I2 about the same axis is gently placed over it, then the new angular velocity of the combined disc will be (a)  (b)  (c) w1 (d)  Answer: (b) |
4. | The moment of inertia of a disc about a tangent axis in its plane is (MHT-CET-2002) (a)  (b)  (c)  (d)  Answer: (c) |
5. | The centre of mass of a system of two particles divides. The distance between them (MHT-CET-2004) (a) Inverse into of square of masses of particle (b) Direct ratio of square of masses of particle (c) Inverse ratio of masses of particle (d) Direct ratio of masses of particle Answer: (c) |
6. | A uniform disc of mass 2 kg is rotated about an axis perpendicular to the plane of the disc. If radius of gyration is 50 cm, then the M.I. of disc about same axis is (MHT-CET-2006) (a) 0.25 kg m2 (b) 0.5 kg m2 (c) 2 kg m2 (d) 1 kg m2 Answer: (b) |
7. | A rod length is l density of material is D and area of cross section A. it is rotates about its axes perpendicular to the length passing through its centre then find its kinetic energy is (MHT-CET-2008) (a)  (b)  (c)  (d)  Answer: (d) |
8. | The moment of inertia of a thin rod of mass M and length l about an axis passing through one of its and perpendicular to length is. (PMT MP 95) (a)  (b)  (c)  (d)  Answer: (b) |
9. | Constant torque acting on a uniform circular wheel changes it angular momentum from A to 4 A in 4 seconds. The magnitude of this torque is (MP PMT 97) (a)  (b) A (c) 4 A (d) 12 A Answer: (a) |
10. | A spherical solid ball of a kg mass and radius 3 cm is rotating about an axis passing through its centre with an angular velocity of 50 radian/s. the kinetic energy of rotation is (CPMT 89) (a) 4500 J (b) 90 J (c) 910 J (d)  Answer: (d) |
