a support crossbeam on a high speed train is made from a titanium rod that has a length of 1.25 m when measured by an observer on the train. the beam is positioned such that the observer on the train measures an angle of 27 degrees between the crossbeam and the floor of the train. (figure 1) at what speed u would the train have to be traveling in order for an observer standing outside the train to measure the angle as 83 degrees ? in the figure, s indicates the reference frame of the observer standing outside the train and s' indicates the reference frame of the observer on the train.