It takes about 6 sec for a stone dropped from rest at the top of a vertical mine shaft to hit the bottom of the shaft. how deep is the shaft?

Consider lifting a box of mass m to a height h using two different methods: lifting the box directly or lifting the box using a pulley (as in the previous part). what is wd/wp, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?