Greg is in a bike race. At mile marker four (out of ten), his speed was measured at 13.5 mph.

Question

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 1

Greg is in a bike race. At mile marker four (out of ten), his speed was measured at 13.5 mph.

The best description for the measured number is: It is the instantaneous speed of the bike rider.