A firecracker explodes in reference frame S at t = 2.0 s . A second firecracker explodes at the same position at t = 5.0s . In reference frame S', which moves in the x-direction at speed v, the first explosion is detected at x' = 5.0m and the second at x' = - 5.0m
What is the speed of frame S' relative to frame S?
What is the position of the two explosions in frame S?