A runner is jogging in a straight line at a steady Vr= 4.5 km/hr. When the runner is
L= 8.1 km from the finish line, a bird begins
flying straight from the runner to the finish
line at vø= 13.5 km/hr (3 times as fast as
the runner). When the bird reaches the finish
line, it turns around and flies directly back to
the runner.
U
finish
line
What cumulative distance does the bird
travel? Even though the bird is a dodo, as-
sume that it occupies only one point in space
(a "zero" length bird), travels in a straight
line, and that it can turn without loss of
speed.
Answer in units of km.

Scissors and a seesaw both cut things that’s the only comparison

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