The momentum (p) of an object is given by the product of its mass (m) and its velocity (v). So, we have:
\[p_{e} = m_{e} \times v_{e}\]
Substituting the given values, we get:
\[p_{e} = 2000 \, \text{kg} \times 7.50 \, \text{m/s} = 15000 \, \text{kg m/s}\]
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