. An empty elevated water tank is pulled by a steel cable by applying a 50 kN forec. The tank is pulled horizontally by 10 cm. The cable is suddenly cut and the resulting free vibration is recorded. At the end of three complete cycles, the time is 5.0 seconds and damping ratio is 3%. Determine amplitude of cycle three, natural period of damped vibration and undamped vibration, effective stiffnes, effective weight, and damping coefficient for the given data.