An object of mass \(m = 3.0\,\text{kg}\) is attached to one end of a string with negligible mass and length \(L = 0.80\,\text{m}\). The object is released from rest at time \(t = 0\), when the string is horizontal. At time \(t = t_1\) the object is at the location shown in the figure, where the string is vertical. Which of the following is most nearly the magnitude of the tension in the string at time \(t = t_1\)?