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.

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.

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

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

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

To solve this problem, we need to find the cumulative distance traveled by the bird.

Let's break down the problem into different parts:

1. The initial distance between the runner and the finish line is L = 4.4 km.
2. The speeds of the runner (vr) and the bird (vb) are given in the problem.
- Runner's speed (vr) = 2.1 km/hr
- Bird's speed (vb) = 10.5 km/hr

Now, let's calculate the time it takes for the bird to reach the finish line:

The distance between the runner and the finish line is L = 4.4 km.
The bird's speed is vb = 10.5 km/hr.

Time taken by the bird to reach the finish line = Distance / Speed
Time = L / vb = 4.4 km / 10.5 km/hr

Now, we need to calculate the time it takes for the bird to travel back to the runner. Since the bird is flying back at the same speed, the time taken in the return journey will be the same.

The cumulative distance traveled by the bird is twice the distance between the runner and the finish line, as it travels there and back.

Cumulative distance traveled by the bird = 2 * L

Substituting the value of L, we get:

Cumulative distance traveled by the bird = 2 * 4.4 km = 8.8 km.

Therefore, the cumulative distance traveled by the bird is 8.8 km.

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