Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 2 - Kinematics in One Dimension - Problems: 14

Answer

a) -0.40 m/$s^{2}$ , car is not decelerating b) +0.80 m/$s^{2}$ , car is decelerating

Work Step by Step

$a = \frac{v-u}{t}$ The direction in which the car is travelling (left) has been designated as the negative direction. When an object's velocity and acceleration are in opposite directions, it is decelerating. In both of the given scenarios, the car's velocity is negative a) $a = \frac{-29.0-(-27.0)}{5.0} =-0.40$ m/$s^{2}$ Acceleration and velocity in the same direction hence car is NOT decelerating b) $a = \frac{-23.0-(-27.0)}{5.0} = +0.80$ m/$s^{2}$ Acceleration and velocity in opposite directions hence car is decelerating
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.