A 3-g bullet is fired horizontally into a 10-kg block of wood suspended by a rope from the ceiling. The block swings in an arc, rising 3 mm above its lowest position. The velocity of the bullet was: 2.4x104 m/s 8.0x102 m/s 8.0 m/s 24.0 m/s unknown since the heat generated in the collision was not given