The 175,000-lb space-shuttle orbiter is in a circular orbit of altitude 200 miles. The two orbital-maneuvering-system (OMS) engines, each of which has a thrust of 6000 lb, are fi red in retrothrust for 150 seconds. Determine the angle β which locates the intersection of the shuttle trajectory with the earth’s surface. Assume that the shuttle position B corresponds to the completion of the OMS burn and that no loss of altitude occurs during the burn.

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B 200 mi