18. Suppose you determine the average speed of a racecar over the interval t 1 t

Question

18. Suppose you determine the average speed of a racecar over the interval t 1 tot 4 sec. Which statement best describes the meaning of average speed in this context? (a) The sum of the initial and final speeds divided by 2. (b) The speed at which the racecar drove most of the time. (c) The constant speed that the racecar travelled at during the 3 seconds. (d) The constant speed needed to travel the same distance as the racecar in the same amount of time (3 seconds) (e) The sum of the distances at t-1, 2, 3, 4 seconds divided by 4.

Explanation / Answer

option d is correct

because this is basic definition of average speed.

all other options may give different values as compared to value according to basic definition

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