When a mass is rotating in a plane about a fixed point its angular momentum is directed along.
The radius
The tangent to orbit
The line at an angle of 45° to the plane of rotation
The axis of rotation
As we learnt in
Centre of Mass of semicircular ring -
It lies at a distance of from centre of the ring along its axis.
-
Along axis of rotation.
Option 1)
The radius
Incorrect
Option 2)
The tangent to orbit
Incorrect
Option 3)
The line at an angle of 45° to the plane of rotation
Incorrect
Option 4)
The axis of rotation
Correct