Question:

When a mass is rotating in a plane about a fixed point its angular momentum is directed along

Updated On: Jul 7, 2022
  • the radius
  • the tangent the orbit
  • the line at angle of $45^{\circ}$ to the plane of rotation
  • the axis of rotation
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The Correct Option is D

Solution and Explanation

When a mass is rotating in a plane about a fixed point, its angular momentum is directed along the axis of rotation.
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Concepts Used:

System of Particles and Rotational Motion

  1. The system of particles refers to the extended body which is considered a rigid body most of the time for simple or easy understanding. A rigid body is a body with a perfectly definite and unchangeable shape.
  2. The distance between the pair of particles in such a body does not replace or alter. Rotational motion can be described as the motion of a rigid body originates in such a manner that all of its particles move in a circle about an axis with a common angular velocity.
  3. The few common examples of rotational motion are the motion of the blade of a windmill and periodic motion.