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A particle is moving with a constant velocity along a line parallel to the positive X-axis. The magnitude of its angular momentum with respect to the origin is, ______ - Physics

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प्रश्न

A particle is moving with a constant velocity along a line parallel to the positive X-axis. The magnitude of its angular momentum with respect to the origin is, ______

विकल्प

  • zero

  • increasing with x

  • decreasing with x

  • remaining constant

MCQ
रिक्त स्थान भरें
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उत्तर

A particle is moving with a constant velocity along a line parallel to the positive X-axis. The magnitude of its angular momentum with respect to the origin is, remaining constant.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 5: Motion of System of Particles and Rigid Bodies - Evaluation [पृष्ठ २६०]

APPEARS IN

सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 11 TN Board
अध्याय 5 Motion of System of Particles and Rigid Bodies
Evaluation | Q I. 3. | पृष्ठ २६०

संबंधित प्रश्न

If several forces act on a particle, the total torque on the particle may be obtained by first finding the resultant force and then taking torque of this resultant. Prove this. Is this result valid for the forces acting on different particles of a body in such a way that their lines of action intersect at a common point?


The density of a rod gradually decreases from one end to the other. It is pivoted at an end so that it can move about a vertical axis though the pivot. A horizontal force F is applied on the free end in a direction perpendicular to the rod. The quantities, that do not depend on which end of the rod is pivoted, are ________________ .


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Two discs of the same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of the disc with angular velocities ω1 and ω2. They are brought in to contact face to face coinciding with the axis of rotation. The expression for loss of energy during this process is, ______


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A Merry-go-round, made of a ring-like platform of radius R and mass M, is revolving with angular speed ω. A person of mass M is standing on it. At one instant, the person jumps off the round, radially away from the centre of the round (as seen from the round). The speed of the round afterwards is ______.


Choose the correct alternatives:

  1. For a general rotational motion, angular momentum L and angular velocity ω need not be parallel.
  2. For a rotational motion about a fixed axis, angular momentum L and angular velocity ω are always parallel.
  3. For a general translational motion , momentum p and velocity v are always parallel.
  4. For a general translational motion, acceleration a and velocity v are always parallel.

Figure shows two identical particles 1 and 2, each of mass m, moving in opposite directions with same speed v along parallel lines. At a particular instant, r1 and r2 are their respective position vectors drawn from point A which is in the plane of the parallel lines. Choose the correct options:

  1. Angular momentum l1 of particle 1 about A is l1 = mvd1
  2. Angular momentum l2 of particle 2 about A is l2 = mvr2
  3. Total angular momentum of the system about A is l = mv(r1 + r2)
  4. Total angular momentum of the system about A is l = mv (d2 − d1)

⊗ represents a unit vector coming out of the page.

⊗ represents a unit vector going into the page.


The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it?

  1. The forces may be acting radially from a point on the axis.
  2. The forces may be acting on the axis of rotation.
  3. The forces may be acting parallel to the axis of rotation.
  4. The torque caused by some forces may be equal and opposite to that caused by other forces.

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