c) Suppose the tourist instead threw the rock with an initial velocity of 8.0 m/s [up]. Determine the velocity and displacement of the rock at 4.0 s.
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![Keeping your sign conventions for direction is very important.all velocity directed down must be
negative, and all velocity directed up must be positive.
1. A tourist drops a rock from rest from a guard rail overlooking a valley.
a)
What is the velocity of the rock at 4.0 s? What is the displacement of the rock
at 4.0 s?
b)
Suppose the tourist instead threw the rock with an initial velocity of 8.0 m/s
[down]. Determine the velocity and displacement of the rock at 4.0s.
c)
[up]. Determine the velocity and displacement of the rock at 4.0 s.
Suppose the tourist instead threw the rock with an initial velocity of 8.0 m/s](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa3e1e159-fbbc-4abe-a502-30f2c92c92d8%2F11b5d3b1-d3a1-4bc2-b327-9b7baff7c8bd%2Fb266a4m_processed.jpeg&w=3840&q=75)
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