[填空题]
A wooden block is cut into abx-id 6 54coe +ldk;;sbrj7u two pieces, one with)9u+l 8nwdf oq three times the mass of the other. A depression is made in both faces of the cut, so that a firecracker can be placed in it with the block reassembled. The reassembled block is set on a rough-surfaced table, and the fuse is lit. When the firecracker explodes, the two blocks separate 8d9u +)lfwqno and slide apart. What is the ratio of distances each block travels?
