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Chapter 2: Q. 3 (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 hot air balloon moving with a constant speed is released from a certain height and reaches down the ground after few seconds.

Step by step solution

01

Data given

A position time graph of a particle having a uniform motion is given in the question

02

Story creation

A hot air balloon is released from a height of 50ftwith an initial speed and it moves with a uniform velocity. After reaching the height of 100ftin 10sec, the balloon begins to move downward with a uniform motion and reaches the ground after 20secof the journey.

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Most popular questions from this chapter

A jet plane is cruising at 300 m/s when suddenly the pilot turns the engines up to full throttle. After traveling 4.0 km, the jet is moving at a speed of 400 m/s. What is the jet’s acceleration, assuming it to be a constant acceleration?

a. How many days will it take a spaceship to accelerate to the speed of light ( 13.0 * 108 m/s) with the acceleration g? b. How far will it travel during this interval? c. What fraction of a light-year is your answer to part b? A light-year is the distance light travels in one year

You are driving to the grocery store at 20 m/s. You are 110 m

from an intersection when the traffic light turns red. Assume

that your reaction time is 0.50 s and that your car brakes with

constant acceleration. What magnitude braking acceleration will bring you to a stop exactly at the intersection?

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.

a. What is the race time for a sprinter who follows this model?

b. A sprinter could run a faster race by accelerating faster at the beginning, thus reaching top speed sooner. If a sprinter’s top speed is the same as in part a, what acceleration would he need to run the 100 meter dash in 9.9 s?

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

FIGURE EX2.7 is a somewhat idealized graph of the velocity of blood in the ascending aorta during one beat of the heart. Approximately how far, in cm, does the blood move during one beat?
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