An inertial frame of reference S′ moves past another inertial frame S moving to the right with speed 15 m s−1. At time zero the origins of the two frames coincide.
(1) A phone rings at location x=20 m and t=5.0 s. Determine using Galilean transformation equations the location of this event in the S′ frame.
(2) A ball is measured to have velocity 5.0 m s−1 in frame S′. Calculate the velocity of the ball in frame S .