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Chapter 1: Q.8 (page 28)
Is the particle in Fig. 1.3 speeding up? Slowing down? Or can you tell? Explain.
Speed is defined as the rate of change of distance over time.
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Write a short description of the motion of a real object for
which FIGURE EX1.19 would be a realistic position-versus-time graph.
Draw a pictorial representation for the following problem. Do
not solve the problem. What acceleration does a rocket need to reach a speed of 200 m/s at a height of 1.0 km?
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 48 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.
Determine the signs (positive, negative, or zero) of the position, velocity, and acceleration for the particle in Figure Q1.6.
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