Gravity:

• Florida gravity (30° latitude) = 32.1302 fps²



• The following examples assume gravity to be 32.0 fps²



• Find Time when given Height
  Time = SQRT (Height(feet) / (Gravity / 2))
  2.5 = SQRT (100 / 16)



• Find Height when given Time
  Height(feet) = (Gravity / 2) * Time²
  100 = 16 * 2.5²



• Find Time when given Velocity
  Time = Velocity (feet per second) / Gravity
  2.5 = 80 / 32



• Find Velocity when given Time
  Velocity (feet per second) = Time * Gravity
  80 = 2.5 * 32



• Find Height when given Velocity
  Height(feet) = Velocity² / (2 * Gravity)
  100 = 80² / (2 * 32) = 6400 / 64



• Find Velocity when given Height
  Velocity (feet per second) = SQRT (2 * Gravity * Height(feet))
  80 = SQRT (2 * 32 * 100) = SQRT (6400)