Physics

Problem

An astronaut on the Moon (where

g_{\text{moon}} = 1.6\,\text{m\,s}^{-2}

) throws a rock vertically upward with an initial speed of

20\,\text{m\,s}^{-1}

. If the same throw is made on Earth where

g_{\text{earth}} = 9.8\,\text{m\,s}^{-2}

, determine the ratio of the total time of flight on the Moon to that on Earth.