A runner is jogging in a straight line at a steady Vr= 4.6 km/hr. When the runner is
L= 3 km from the finish line, a bird begins
flying straight from the runner to the finish
line at vb= 9.2 km/hr (2 times as fast as the
runner). When the bird reaches the finish
line, it turns around and flies directly back to
the runner.
or
finish
line
L
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.