College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 9 - Conceptual Questions - Page 358: 2


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Work Step by Step

(a) The water that is in the hose exerts a force on the water that is about to a result, this water also exerts a reaction force to the hose which exit the nozzle, which causes the water to exit the nozzle at high speed. As exerts a large backward force on the firefighter. (b) If another firefighter steps on the hose, forming a constriction, the speed of water will increase in the hose due to the reduction in the area as Flow per unit time = Area * Velocity If the increase in speed is sufficiently large, turbulent flow takes place which is unsteady and chaotic. This is the reason why the hose begins to pulsate wildly
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