Areal velocity equal to the magnitude of the cross product of vectors "AB" and "AC". This area can also be viewed as a vector with this magnitude, pointing in a direction perpendicular to the parallelogram; this vector is the cross product itself: Hence The areal velocity is this vector area divided by Δ"t" in the limit that Δ"t" becomes vanishingly small: But, formula_4 is the velocity vector formula_5 of the moving particle, so that On the other hand, the angular momentum of the particle is and hence the angular momentum equals 2"m" times the areal velocity. Conservation of areal velocity is a
N. S. Krishnan dialogues and expressed them in his drama and films so that the message came across, but the subject was not offended. He acted in nearly 150 Tamil films and the matinee-duo of N. S. Krishnan and T. A. Madhuram (later his wife) was very popular in his day; he also did roles along with leading stage and cine artists such as T. S. Durairaj, "Pulimootai" Ramasamy, C.S. Pandian and writers such as Udumalai Narayana Kavi and Subbu Armugham and gave a number of hits. He was a talented singer and his hits include "Sivakavi", "Raja Rani", and "Manamagal". Though he