A Water Rocket Built from a Two-Liter Bottle Half-Filled with Water

question 17

Multiple Choice

A water rocket built from a two-liter bottle half-filled with water pressurized with compressed air can develop a thrust of 300 N. At what rate would water have to come out of the rocket to develop that thrust? The jet of water emerging from the bottle has a diameter of 2.20 cm and the density of water is 1000 kg/m³.

• A) 2.70 kg/s
• B) 5.30 kg/s
• C) 10.7 kg/s
• D) 32.1 kg/s
• E) 21.4 kg/s

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