48. A gantry for a crane is shown schematically in Figure 2.66. In this …gure, the gantry is represented by the wheeled vehicle and the crane by the simple pendulum of length l with mass m at its end....

48. A gantry for a crane is shown schematically in Figure 2.66. In this …gure, the gantry is represented by the wheeled vehicle and the crane by the simple pendulum of length l with mass m at its end. The gantry is oscillating with the displacement x(t) = A sin !t: If A is very small, what should ! be so that the crane has an amplitude of motion equal to 2A? Assume l =