Chapter-7: Systems Of Particles And Rotational Motion |

1. The unit of the radius of gyration is –

- Kg m²
- m
- Kg
- Kg m

2. A couple produces –

- Only linear motion
- Only rotational motion
- Linear and rotational motion both
- No motion

3. The center of mass of a body –

- Lies always at the geometrical center
- Lies always inside the body
- Lies always outside the body
- May lie within or outside the body

4. Moment of linear-momentum is-

- Couple
- Angular-momentum
- Impulse
- Torque

5. S. I. unit of moment of inertia is –

- Kgm
- Kgm⁻¹
- Kgm²
- Kgm⁻²

6. Radius of gyration of a body depends upon –

- axis of rotation
- translational motion
- the shape of the body
- area of the body

7. The unit of the Torque is –

- N
- Nm²
- Nm
- None of these.

8. The center of mass of a system of particles does not depend on –

- Masses of the particles
- Forces on the particles
- Position of the particles
- The Relative distance between the particles

9. Angular momentum is –

- Axial vector
- Scalar
- Polar vector
- None of these

10. Analogue of mass in rotational motion is –

- moment of inertia
- torque
- radius of gyration
- angular momentum

11. Unit of angular momentum is-

- N-m
- Kg.m/s²
- Kg.m/s
- Kg²m/s²

12. The moment of inertia of a body does not depend upon-

- Axis of rotation
- Mass
- Distribution of mass
- Angular velocity

13. A shell at rest explodes. The center of mass of the fragments-

- Moves along a particle path
- Moves along an elliptical path
- Moves along a straight line
- Remains at rest.