1. [-/4 Points] DETAILS MY NOTES SERPSE10 38.1.0P.001. ASK YOUR TEACHER PRACTICE ANOTHER As a test of the Galilean transformation equations, two boys are playing catch as shown in the figure below. The person in the truck throws a ball in the backward direction at a speed of 19.5 m/s relative to the truck which is moving at a speed of 10.4 m/s relative to the ground. -0, : Yiruck b '@ (a) What is the velocity (in m/s) of the ball as measured by the observer on the ground? magnitude | J m/s direction Select--