関連ワード:  formula of motion in physics class 9    equation of motion in physics class 9    equation of motion formula in physics class 9    third equation of motion in physics class 9    first equation of motion in physics class 9    all formulas of motion in physics for class 9    formulas of physics class 9 chapter motion    physics equations of motion class 9 questions    what is motion in physics class 9    motion class 9 formula