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| Teaching Since: | May 2017 |
| Last Sign in: | 409 Weeks Ago |
| Questions Answered: | 66690 |
| Tutorials Posted: | 66688 |
MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
An experimental rocket sled weighs 5200 lb and is propelled by six rocket motors each with an impulse rating of 8600 lb-sec. The rockets are fired at 1-sec intervals, and the duration of each rocket firing is 2 sec. If the velocity of the sled 10 sec from the start is 200 mi/hr, determine the time average R of the total aerodynamic and mechanical resistance to motion. Neglect the loss of mass due to exhausted fuel compared with the mass of the sled.

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