## Physics: Principles with Applications (7th Edition)

Published by Pearson

# Chapter 2 - Describing Motion: Kinematics in One Dimension - Search and Learn: 4

#### Answer

abc. Negative x, speeding up, negative acceleration. def. Positive x, speeding up, positive acceleration. g. No change, speed is zero, acceleration is zero.

#### Work Step by Step

abc. During the interval from A to B, it is moving in the negative x-direction (its displacement is negative), speeding up (the magnitude of the slope of the x-t graph is increasing), and the acceleration is negative (the position-time graph is concave down). def. During the interval from D to E, it is moving in the positive x-direction (its displacement is positive), speeding up (the magnitude of the slope of the x-t graph is increasing), and the acceleration is positive (the position-time graph is concave up). g. During the interval from C to D, the object is not moving at all, remains stationary, and the acceleration is zero.

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