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Consider the following provided data.

The spacecraft's thrust is \(T = 0.09\;N\), and its mass is \(\rm{m} = 480\;{\rm{kg}}\).

The time under consideration is t = 1 week, which translates to \(\left( {7 \times 24 \times 60 \times 60} \right)\;{\rm{s}}\).

When applying Newton's 2nd Law to the spacecraft's motion with the given thrust, we make a few assumptions.

First, we assume that no other external forces are acting on the spacecraft. 

Second, we suppose that the thrust is applied uniformly. 

Finally, we imagine the spacecraft is moving along a straight trajectory.

Under these conditions, we have T = ma.

Solving for acceleration gives us a = T/m.

Plugging in our given values, we have:

\(a= \frac{{0.09\;{\rm{N}}}}{{450\,{\rm{kg}}}} \)

\(a= 187.5 \times {10^{ - 6}}\;{\rm{m/}}{{\rm{s}}^2}\).