We will always calculate the average speed correctly by simply taking half the sum of the initial and final speeds during the time interval for all of the following cases except
A) when the distance does not change.
B) when the velocity is constant.
C) when the acceleration is constant.
D) when the acceleration is not constant.

Question

Quizplus · Accepted Answer

The average speed is correctly calculated by taking the total distance traveled divided by the total time taken. The method of taking half the sum of the initial and final speeds only gives the correct average speed when the acceleration is constant (uniform acceleration). In cases where the acceleration is not constant, this method does not necessarily yield the correct average speed, as the speed could be changing in a non-linear manner throughout the time interval.

We Will Always Calculate the Average Speed Correctly by Simply