Submission 1 (0/1 points) Tuesday, September 5 2017 09:29 PM CDT A rod in the reference frame of observer O makes an angle of 31° with the x axis. According to observer O', who is in motion in the x direction with velocity u, the rod makes an angle of 46° with the x axis. Find the velocity u (in terms of c). 0.59 XC Submission 2 (0/1 points) Tuesday, September 5 2017 09:38 PM CDT A rod in the reference frame of observer O makes an angle of 31° with the x axis. According to observer O', who is in motion in the x direction with velocity u, the rod makes an angle of 46° with the x axis. Find the velocity u (in terms of c). 0.66 Xc