Physics (10th Edition)

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

Chapter 7 - Impulse and Momentum - Check Your Understanding - Page 182: 11


The forward momentum of the plane decreases.

Work Step by Step

According to the conservation of total linear momentum, $$\vec{p_{you}}+\vec{p_{plane}}=\vec{p_0}$$ The total linear momentum of the plane before you get up is conserved and always the same as long as there is no external force affecting its motion. Therefore, as your momentum, or $p_{you}$, increases, it follows that $p_{plane}$ must decrease to balance the rise. So the forward momentum of the plane decreases.
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