Chapter 2 Questions- W18 (3).docx QSearch in Document A Home Layout Document Ele

Question

Chapter 2 Questions- W18 (3).docx QSearch in Document A Home Layout Document ElementsTables Charts SmartArt Review Font Paragraph Styles Themes Text Box-, Themes 3) A toy car is moving along a straight track. Its motion is restricted to the positive part of the x-axis. Match the situations described below to one of the acceleration versus time graphs. You may use a graph more than once or not at all. If you think that there is no match, write 'None'. In each case, explain your reasoning. a. The car speeds up at a steady rate, moving away from the origin. b. The car slows down at a steady rate, moving away from the origin. c. The car moves at a constant speed toward the origin. d. The car speeds up at a steady rate, moving toward the origin. melrie 120%

Explanation / Answer

# a-

In this case the car is speeding at a steady rate, which means that the acceleration is constant and positive.

This condition is perfectly described by figure B (2nd figure).

#b-

In this case the car is slowing down at a steady state, which means that the acceleration is constant but negative.

This condition is perfectly described by figure D (3rd figure).

#c-

In this case the car moves at a speed which means that the acceleration is zero.

This condition is described by figureE .(5th figure)

#d-

In this case also the acceleration is constant but car is moving towards origin. But the acceleration vs time graph do not show the direction of movement. It can only show the changing speed. Here we can again use figure B to describe this condition.

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