Question
A block of mass m = 1 kg slides with velocity v = 6 m/s on a frictionless horizontal surface and
collides with a uniform vertical rod and sticks to it as shown. The rod is pivoted about O and swings
as a result of the collision making angle $\theta $ before momentarily coming to rest. If the rod has mass
M = 2 kg, and length $l$ = 1 m, the value of $\theta $ is approximately :
(take g = 10 m/s2)