A large block of wood of mass $$M = 5.99$$ kg is hanging from two long massless cords. A bullet of mass $$m = 10$$ g is fired into the block and gets embedded in it. The (block + bullet) then swing upwards, their center of mass rising a vertical distance $$h = 9.8$$ cm before the (block + bullet) pendulum comes momentarily to rest at the end of its arc. The speed of the bullet just before the collision is: (Take $$g = 9.8$$ m s$$^{-2}$$)