Calculate the velocity of an object in free fall (Vi = 0) at the 9th second given that air resistance is approximately 0.05 × gravity (customary units). I believe the answer would be 273.6 ft/s but I am not entirely sure.

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.