float GetMassOnPlatform(GameObject t)
    {
        PulleyPlatform pulleyPlatform = t.GetComponent <PulleyPlatform>();
        float          mass           = pulleyPlatform.massOnPlatform;

        return((pulleyPlatform.isPositive) ? mass : -mass);
    }
    void setMassOfSystemOnPlatform(GameObject t)
    {
        PulleyPlatform pulleyPlatform = t.GetComponent <PulleyPlatform>();

        pulleyPlatform.massToApply = totalMassOnSystem;
    }