The average velocity can be defined by subtracting the initial velocity from the

Question

The average velocity can be defined by subtracting the initial velocity from the final velocity and dividing that result by the time interval. In which one of the following situations would it be incorrect to apply the above definition to determine the average velocity?
a) A state police patrol car is parked on the median of the interstate highway.
b) A mallard duck is flying due south at 17 m/s.
c) JoEllen rolled the bowling ball straight down the lane.
d) The hot air balloon drifted upward at a constant speed of 2.0 m/s.
e) A plane is rolling with a constant acceleration due east on a runway.
THANKS

Explanation / Answer

vav=(vi-vf)/t

it is valid when there is no acceleration

so (e) is incorrect

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