College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A flying squid (family Ommastrephidae) is able to “jump” off the surface of the sea by taking water into its body cavity and then ejecting the water vertically downward. A 0.850-kg squid is able to eject 0.300 kg of water with a speed of 20.0 m/s. (a) What will be the speed of the squid immediately after ejecting the water? (b) How high in the air will the squid rise?

(a)

To determine
The speed of the squid immediately after ejecting the water.

Explanation

Applying conservation of momentum in the vertical direction,

msvs+mwvw=(ms+mw)(0)vs=âˆ’(mwms)vw

• vs is the velocity of the squid
• ms is the mass of the squid
• mw is the mass of the water
• vw is the velocity of the water

Substitute 0.300â€‰kg for mw , 0

(b)

To determine
The height the squid rises in air.

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