Examine the information. a runner travels 10 m/s forward for 10 seconds. which of the quantities in the sentence would be considered a vector quantity, and why? the quantity 10 m/s is the only vector quantity because it is a measurement of speed. the quantity 10 s is the only vector quantity because it measures time. the quantity 10 m/s is the only vector quantity because it is a measurement that includes a direction. the quantities 10 m/s and 10 s are vector quantities because these numbers are both measurements that do not include direction.