Question

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

(a) Angular momentum remains constant.

(b) Acceleration vector a is towards the centre.

(c) Particle moves in a spiral path with decreasing radius.

(d) The direction of angular momentum remains constant

Answer 1

Correct option (d) The direction of angular momentum remains constant

Explanation :

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 angular momentum remains the same and its magnitude may vary.