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Which of the following statements, if any, involves a vector? (Several choices may be correct.) O (a) I walked 2 miles along the beach. O (b) I walked 2 miles due north along the beach. O (c) I jumped off a cliff and hit the water traveling at 17 miles per hour. O (d) I jumped off a cliff and hit the water traveling straight down at a speed of 17 miles per hour.The following figure shows the displacement vector of a car. Which of the following is the correct description of this vector? N W E 10 km 30 O A distance of 10 km in a direction of 30" north of west O A distance of 10 km O None of the above is a correct description of the displacement vector. O A distance of 10 km in a direction of 60" north of west O A distance of 10 km in a direction of 30" east of northWhich one of the following statements is true concerning scalar quantities? O Scalar quantities must be represented by base units. O Scalar quantities can be added to vector quantities using rules of trigonometry. O Scalar quantities have both magnitude and direction. O Scalar quantities can be added to other scalar quantities using rules of trigonometry. O Scalar quantities can be added to other scalar quantities using rules of ordinary addition