Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 9 - Linear Momentum and Collisions - Problems and Conceptual Exercises - Page 294: 74

Answer

(a) $2.7N$ (b) $3.78N$

Work Step by Step

(a) We can find the change in the apple's momentum per second as follows: $\frac{\Delta P}{\Delta t}=F$ $\frac{\Delta P}{\Delta t}=mg$ We plug in the known values to obtain: $\frac{\Delta P}{\Delta t}=2.7N$ (b) We can find the required change in momentum as follows: $\Delta P=F\Delta t$ We plug in the known values to obtain: $\Delta P=(2.7N)(1.4s)$ $\Delta P=3.78N$
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