Question

Three particles A, B and C are moving as shown
in figure. Calculate the angular momentum of the
third particle C so that the angular momentum of
system about point o becomes zero.
(1) 80r kg m s
(3) 40 Å kg m s
(2) -80k kg m s
(4) -40 Å kg m s​

Answer 1

80r kg m s is the correct answer