greg is in a bike race. at mile marker four (out of ten), his speed was measured at 13.5 mph. which best…

greg is in a bike race. at mile marker four (out of ten), his speed was measured at 13.5 mph. which best describes the measured number? it is the average speed of the bike rider. it is the instantaneous speed of the bike rider. it is the instantaneous velocity of the bike rider. it is the average velocity of the bike rider.

greg is in a bike race. at mile marker four (out of ten), his speed was measured at 13.5 mph. which best describes the measured number? it is the average speed of the bike rider. it is the instantaneous speed of the bike rider. it is the instantaneous velocity of the bike rider. it is the average velocity of the bike rider.

Answer

Brief Explanations:

Speed is a scalar quantity that only has magnitude. Instantaneous speed is the speed at a particular moment. Since the speed is measured at a specific mile - marker (a particular moment in the race), it is the instantaneous speed. Velocity is a vector quantity with both magnitude and direction, and we are only given the magnitude of the speed here. Average speed would be calculated over a distance or time interval, not at a single point.

Answer:

It is the instantaneous speed of the bike rider.