(is this a question i can ask @trabolic? ) the velocity of a train relative to the ground is represented by the distance from a to b in the diagram. the velocity of a ball thrown inside the train at an angle of 66° relative to the train is represented by the distance from b to c. what is the distance from a to c (the velocity of the ball relative to the ground), correct to two decimal places? assume that all the points in the diagram lie in the same plane. a. 21.14 m/s b. 18.03 m/s c. 17.20 m/s d. 15.00 m/s