What is the car's average velocity (in m/s) in the interval between t = 0.5 s
to t = 2 s?

.

Explanation:

Consider a time period of duration . Let change in the position of an object during that period of time be denoted as . The average velocity of that object during that period would be:

.

For the toy car in this question, the time interval has a duration of . That is: . (One decimal place, two significant figures.)

On the other hand, what would be the change in the position of this toy car during that ?

Note, that from readings on the snapshot in the diagram:

Therefore, the change to the position of this toy car over that time period would be . (One decimal place, two significant figures.)

The average velocity of this car over this period of time would thus be:

. (Two significant figures.)

which statement about this sum is true? −245+2.7

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.