A thin rod of mass M and length L is struck at one end by a ball of clay of mass m, moving with speed v as shown in the figure. The ball sticks to the rod. After the collision, the angular momentum of the clay-rod system about A, the midpoint of the rod, is
a.
(m + M/3)(vL/2)
b.
(m + M/12)(vL/2)
c.
(m + M/6)(vL/2)
d.
mvL/2
e.
mvL
d
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