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Chapter 1: Q.4 (page 28)
Does the object represented in FIGURE Q1.4 have
a positive or negative value of ax? Explain.
Acceleration is defined as the rate of change of velocity with respect to time.
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Problems 49 show a partial motion diagram. For each:
a. Complete the motion diagram by adding acceleration vectors.
b. Write a physics problem for which this is the correct motion
diagram. Be imaginative! Don’t forget to include enough
information to make the problem complete and to state clearly
what is to be found.
c. Draw a pictorial representation for your problem.
Problem 52 show a partial motion diagram. For each:
a. Complete the motion diagram by adding acceleration vectors.
b. Write a physics problem for which this is the correct motion
diagram. Be imaginative! Don’t forget to include enough
information to make the problem complete and to state clearly
what is to be found.
c. Draw a pictorial representation for your problem.
Estimate the average speed with which the hair on your head grows. Give your answer in both m/s and mm/hour. Briefly describe how you arrived at this estimate.
A roof tile falls straight down from a two-story building. It
lands in a swimming pool and settles gently to the bottom. Draw a complete motion diagram of the tile.
Problem 45 show a motion diagram. For each of these problems, write a one or two sentence “story” about a real object that has this motion diagram. Your stories should talk about people or objects by name and say what they are doing.
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