Ataxi starts from monument circle and travels 5 kilometers to the east for 5 minutes. then it travels 10 kilometers to the south for 10 minutes.
what is the taxi moving with reference to? (monument circle, the passengers, the taxi driver)
what changes? (average speed, average velocity)
what stays the same? (average speed, average velocity, direction)

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction