ENG102_HW9

ENG102_HW9 - November 25, 2011 November 30 (at or before...

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DATE: November 25, 2011 DUE: November 30 (at or before 2:00pm), 2011 ENG102, homework set #9. 1. Look at Problem 4/71 on page 315 in the book. a. Solve the problem. We now assume that a = 0 and that the tank is empty at t = 0 . b. Determine the necessary external force. c. How long time does it take to fill the tank with 80kg water? What distance has the tank traveled? d. What is the power supplied to the tank? e. What is the energy loss in scooping the 80kg water? m M m u u 1 2 2 M u m m u 1 2. Look at the figures above. A (very weak) rocket consists of a rocket shell with mass M and one chemical reaction of material that has mass 2 m . The two chemical products each have mass m 1 = m 2 = m and velocity u (relative to the shell) such that their combined momentum relative to the shell M is zero (this is reasonable since the rocket carried this fuel before the chemical reaction. The system immediately after the chemical reaction is shown in the left figure, while the system is shown a bit later
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This note was uploaded on 01/12/2012 for the course ENG 102 taught by Professor Eke during the Winter '08 term at UC Davis.

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ENG102_HW9 - November 25, 2011 November 30 (at or before...

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