The equation only is true for objects with negligible air resistance. A feather does not have this property. Using the equation shown: 50 = -16t^2 t^2 = 50/16 = 3.125 t = sqrt(3.125) = 1.77 seconds
I belive his answer is wrong B/c the graph does not even start near 310 the first to bars make it to 50 and 150 so even if u add the two together it would only be 200 so, the answer would be B
