Problem: John and Mary are skating at an ice rink. John skates at a constant speed of 6.8 m/s, with respect to the ice surface, directly south. Mary skates at a constant speed of 12.5 m/s in a direction of 35° west of south, with respect to the ice.
Part A: What are the magnitude and direction of Mary's velocity with respect to John?
I need help to find the magnitude and direction of Mary's velocity with respect to John and give the direction as measured relative to due south.