Question

If a body is rotating about an axis, passing through its centre of mass then its angular momentum is directed along itsImmersive Reader
(1 Point)
Radius
Tangent
Circumference
Axis of rotation

Answer 1

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

Answer 2

question : if a body is rotating about an axis, passing through its centre of mass then its angular momentum along its

1. radius
2. tangent
3. circumference
4. axis of rotation

Answer : option (4) axis of rotation.

explanation : we know, angular momentum is defined as the product of moment of inertia and the angular velocity of the rotating object.

i.e., L = I × ω

we know, moment of inertia is a scale quantity but angular velocity is a vector quantity which is directed along axis of rotation. so the angular momentum must be directed along axis of rotation.

hence, if a body is rotating about an axis, passing through its centre of mass then its angular momentum along its axis of rotation.