1. The problem statement, all variables and given/known data A body falls from a height of 409.5m under gravity. Determine: (a) The time taken to reach the ground, if the initial velocity is zero (b) The velocity at impact with ground. 2. Relevant equations s= ut v= u+at s=ut + 0.5*at^2 3. The attempt at a solution i tried using the formulas above but couldn't get anywhere, i guess i need to use 9.8 for the acceleration due to gravity too?