SOLUTION: A robin flies 200 m [E] in 29 s, lands on a tree branch and rests there for 35 s. Then the robin turns and flies 500 m [W] in 65 s. Which of the following is the robin's average ve
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Question 1182818: A robin flies 200 m [E] in 29 s, lands on a tree branch and rests there for 35 s. Then the robin turns and flies 500 m [W] in 65 s. Which of the following is the robin's average velocity?
a. 0.43 m/s [E]
b. 0.43 m/s [W]
c. 2.33 m/s [E]
d. 2.33 m/s [W] Answer by ikleyn(52921) (Show Source):
The question is about the average velocity.
Velocity is a vector; so we should determine the displacement from the starting to the ending point.
The displacement is 500 m - 200 m West, or 300 m West.
The total time from the starting to the ending time moments is 29+35+65 = 129 seconds.
Now the average velocity = = = 2.33 m/s West.
ANSWER. Option d).
