Gravity Formulas

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)


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