A block of mass 1.9 kg is at rest at the edge of a table, of height 1 m. A bullet of mass 0.1 kg collides with the block and sticks to it. If the velocity of the bullet is 20 m/s in the horizontal direction just before the collision then the kinetic energy just before the combined system strikes the floor, is [Take g=10 m/s2 . Assume there is no rotational motion and losses of energy after the collision is negligible.]
(a) 20 J
(b) 21 J
(c) 19 J
(d) 23 J