A pendulum has a length L = 1.47 m. It hangs straight down in a jet plane at rest, as shown by the dotted line in the figure. Then the jet accelerates uniformly, and during that time, the pendulum moves to the equilibrium position shown by the solid line, with D = 0.39 m. What is the acceleration of the plane?
2.Relevant equations f=ma
The Attempt at a Solution
when i drew this out i thought that we needed to have theta because its swinging at an angle but we don't have theta and iam stuck bc iam not sure if iam supposed to use a constant acceleration formula...