[填空题]
A wooden block is cuxf v3.smktu+- t cte. 77(tiyppy h9jw: into two pieces, one with three times the mass of the other. A depression is made in both faces of the cut, so that a firecrackphtc y t. 7e:w9(jp7iyer 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 and slide apart. What is the ratio of distances each block travels?
