CHAPTER-7: SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

1. The unit of the radius of gyration is –

  • Kg m²
  • m
  • Kg
  • Kg m

[su_spoiler title=”View Answer ” style=”fancy”]m [/su_spoiler]

2. A couple produces –

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

[su_spoiler title=”View Answer ” style=”fancy”]Only rotational motion [/su_spoiler]

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

[su_spoiler title=”View Answer ” style=”fancy”]May lie within or outside the body [/su_spoiler]

4. Moment of linear-momentum is-

  • Couple
  • Angular-momentum
  • Impulse
  • Torque

[su_spoiler title=”View Answer ” style=”fancy”]Angular-momentum [/su_spoiler]

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

  • Kgm
  • Kgm⁻¹
  • Kgm²
  • Kgm⁻²

[su_spoiler title=”View Answer ” style=”fancy”]Kgm² [/su_spoiler]

6. Radius of gyration of a body depends upon –

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

[su_spoiler title=”View Answer ” style=”fancy”]axis of rotation [/su_spoiler]

7. The unit of the Torque is –

  • N
  • Nm²
  • Nm
  • None of these.

[su_spoiler title=”View Answer ” style=”fancy”]Nm [/su_spoiler]

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

[su_spoiler title=”View Answer ” style=”fancy”]Forces on the particles [/su_spoiler]

9. Angular momentum is –

  • Axial vector
  • Scalar
  • Polar vector
  • None of these

[su_spoiler title=”View Answer ” style=”fancy”]Axial vector[/su_spoiler]

10. Analogue of mass in rotational motion is –

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

[su_spoiler title=”View Answer ” style=”fancy”]moment of inertia [/su_spoiler]

11. Unit of angular momentum is-

  • N-m
  • Kg.m/s²
  • Kg.m/s
  • Kg²m/s²

[su_spoiler title=”View Answer ” style=”fancy”]Kg.m/s²[/su_spoiler]

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

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

[su_spoiler title=”View Answer ” style=”fancy”]Angular velocity [/su_spoiler]

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.

[su_spoiler title=”View Answer ” style=”fancy”]Remains at rest. [/su_spoiler]

 

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