University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 2 - Motion Along a Straight Line - Problems - Exercises - Page 61: 2.40


4.11 m/s.

Work Step by Step

The lander has a constant downward acceleration. We know the initial velocity of -0.8 m/s and the displacement of -5.0 m. Use the kinematics formulas for constant acceleration. $v_f^2=v_o^2+2a(\Delta x)$ $v_f^2=(-0.8m/s)^2+2(-1.6m/s^2)(-5.0m)$ $v_f=4.1 m/s$
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