A pendulum has a length L = 1.04 m, with mass m=0.43 kg at the end. It hangs straight down in a jet plane about to take off as shown by the dotted line in the figure. The jet then accelerates uniformly, and while the plane is accelerating, the equilibrium position of the pendulum shifts to the position shown by the solid line, with D = 0.380 m. Calculate the magnitude of the plane's acceleration.
The Attempt at a Solution
I really don't know where to start with this problem.. I drew a free body diagram for the pendulum weight and didnt know what to do next
Thanks for anyone who can help :)