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Chapter 2: Q. 1 (page 58)

For Questions 1 through 3, interpret the position graph given in each

figure by writing a very short “story” of what is happening. Be creative!

Have characters and situations! Simply saying that “a car moves

100 meters to the right” doesn’t qualify as a story. Your stories should

make specific reference to information you obtain from the graph, such

as distance moved or time elapsed.

Short Answer

Expert verified

A position-time graph is given here according to which a body is moving with uniform speed and acceleration.

Step by step solution

01

Given data

A position-time graph is given in this question.

02

Story creation

Tiya has gone to her friend's home which is at a distance of 5mifrom her home. She moved to the market from there which is at a distance of 5mifrom her friend's home that took 20min. After another 20minof marketing, she moved back home. Tiya covered a total distance of 10mito her home in localid="1647936182272" 40minuteswith constant speed while travelling back.

03

Graphical representation

The position-time graph should be as follows:

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Most popular questions from this chapter

As a science project, you drop a watermelon off the top of the Empire State Building, 320 m above the sidewalk. It so happens that Superman flies by at the instant you release the watermelon. Superman is headed straight down with a speed of 35 m/s. How fast is the watermelon going when it passes Superman?

In the problem, you are given the kinematic equation that are used to solve a problem.

  1. Write a realistic problem for which this is the correct equation. Be sure that the answer your problem requests is consistent with the equation given.
  2. Draw the pictorial presentation for your problem.
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0m/s2=5m/s2-29.8m/s2sin100x1-0m

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Careful measurements have been made of Olympic sprinters in the 100 meter dash. A simple but reasonably accurate model is that a sprinter accelerates at 3.6 m/s2 for 313s, then runs at constant velocity to the finish line.

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c. By what percent did the sprinter need to increase his acceleration in order to decrease his time by 1%?

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