A spacecraft cruising in space at a constant velocity of 2100 ft/s has a mass of 24,000 lbm. To slow down the spacecraft, a solid fuel rocket is fired, and the combustion gases leave the rocket at a constant rate of 150 lbm/s at a velocity of 5000 ft/s in the same direction as the spacecraft for a period of 5 s. Assuming the mass of the spacecraft remains constant, determine the following: The deceleration of the spacecraft during this 5 s period. The change in velocity of the spacecraft during this time period. The thrust exerted on the spacecraft.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A spacecraft cruising in space at a constant velocity of 2100 ft/s has a mass of 24,000 lbm. To slow down the spacecraft, a solid fuel rocket is fired, and the combustion gases leave the rocket at a constant rate of 150 lbm/s at a velocity of 5000 ft/s in the same direction as the spacecraft for a period of 5 s. Assuming the mass of the spacecraft remains constant, determine the following:

  1. The deceleration of the spacecraft during this 5 s period.
  2. The change in velocity of the spacecraft during this time period.
  3. The thrust exerted on the spacecraft.
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