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0 fires its engines.

(See attached file for full problem description with units and diagram)
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Far in space, where gravity is negligible, a 475   rocket traveling at 95.0   fires its engines. The figure     shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible.
(see attacement)
a.) What impulse does the engine impart to the rocket?
b.) At what time does the rocket reach its maximum speed?
c.) What is the maximum speed of the rocket?
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  shows the thrust force as a function of time. The mass lost by the
rocket during these 30 s is negligible.
a.) What impulse does the engine impart to the rocket?
b.) At what time does the rocket reach its maximum speed?
c.) What is the maximum speed of the rocket?

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