Question

A runner is jogging in a straight line at a
steady vr= 2.1 km/hr. When the runner is
L= 4.4 km from the finish line, a bird begins
flying straight from the runner to the finish
line at vb= 10.5 km/hr (5 times as fast as
the runner). When the bird reaches the finish
line, it turns around and flies directly back to
the runner.
L
vb
vr
finish
line
What cumulative distance does the bird
travel? Even though the bird is a dodo, assume 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.

This has had me stumped for a while, I'm terrible at physics apparently.

Answer 1

Look at the website below:
www.jiskha.com/questions/1759050/A-runner-is-jogging-in-a-straight-line-at-a-steady-vr-2-2-km-hr-When-the-runner

Answer 2

My problem with it is that I don't understand the 8/3 and 2/6.6 stuff. I have already tried using that as an example to do mine, but I just don't know what the fractions represent or how they came to be.

Answer 3

i really don't know how to do it but try to look at similar questions below.

Answer 4

Well can anyone answer it for me because I've looked and looked, so far to no avail, I would be greatly appreciative.

Answer 5

You would have to two equations one would be
d= 4.4 + 4.4- 2.1 * t
and the second one would be
d= 10.5 * t
than you would substitute the numbers into this equation like so
t= 4.4 + 4.4- 2.1 (d /10.5)
and than you would solve for your answer