Momentum is calculated using the formula:
\[ \text{Momentum} = \text{mass} \times \text{velocity} \]
Given that the mass of the mouse is 1 kilogram and the velocity is 0.01 meters per second, we can substitute these values into the formula:
\[ \text{Momentum} = 1 , \text{kg} \times 0.01 , \text{m/s} = 0.01 , \text{kg} \cdot \text{m/s} \]
Therefore, the mouse's momentum is:
0.01 kg⋅m/s.