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NEET2014PhysicsRotational MotionActual

A particle moves in a circular path with decreasing speed. Choose the correct statement.

Options

  1. AAngular momentum remains constant
  2. BAcceleration a is towards the centre
  3. CParticle moves in a spiral path with decreasing radius
  4. DThe direction of angular momentum remains constant

Correct answer

D. The direction of angular momentum remains constant

Step-by-step solution

Angular momentum is an axial vector, so its direction is along the axis, perpendicular to the plane of motion which is not changing because of change of speed. Therefore, the direction of angular momentum remains the same and its magnitude may vary.

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