Answer
This is a writing exercise for the student, and answers will vary. Here is a sample.
Astra continually drives around a square track at constant speed. During what time intervals is her velocity constant?
a. The entire time
b. Only while she is moving along one of the 4 straight sides
c. Only when she is turning a corner
d. There is no time interval during which her velocity is constant
The correct choice is B. Velocity is constant when an object moves at constant speed, and in a straight line.
