John lives on a planet on where the acceleration due to gravity is 2.4 m/s 2, and he sees some coins falling vertically past his window. John times...

John lives on a planet on where the acceleration due to gravity is 2.4 m/s 2, and he sees some coins falling vertically past his window. John times some of the coins which seem to take 0.4 seconds to pass from the top to the bottom of his window (which is 3.2 meters from top to bottom). What is the speed of the coins in m/s when they reach the soft furnishings which are growing 6.1 meters below the bottom of his window?