19. A salesperson drove north 224 km from Minnehaha to Yellville. He then turned around and drove back south for 249 km to Mount Carmel. The total trip took 5 hours What was the salesperson's average velocity for the entire trip?
"Round your answer to two decimal places if necessary
0 -0.69 km per hour
O 5 km per hour
0 5.72 km per hour
2.56 km per hour
O None of these is correct

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