# Physics

Part one was answered, thank you. This was Part one:A runner is jogging at a steady 6.2 km/hr. When the runner is 4.9 km from the ﬁnish line, a bird begins ﬂying from the runner to the ﬁnish line at 24.8 km/hr (4 times as fast as the runner). When the bird reaches the ﬁnish line, it turns around and ﬂies back to the runner.

valencia (jmv2734) – Position and Velocity – widbin – (20156)8
L
vb
vr
finish line

How far does the bird travel? Even though the bird is a dodo, assume that it occupies only one point in space (a “zero” length bird) and that it can turn without loss of speed. Answer in units of km.
THIS IS PART 2 of 2)
After this ﬁrst encounter, the bird then turns around and ﬂies from the runner back to the ﬁnish line, turns around again and ﬂies back to the runner. The bird repeats the back and forth trips until the runner reaches the ﬁnish line.

How far does the bird travel from the be-ginning (including the distance traveled to the ﬁrst encounter)?

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1. Val/Elsa/Joseph -- you must be having an identity crisis!

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Ms. Sue
2. see related questions below

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