Answer:
The momentum (\(p\)) of an object is given by the product of its mass (\(m\)) and velocity (\(v\)):
\[ p = m \cdot v \]
For the empty truck:
\[ p_{\text{empty}} = m_0 \cdot v_0 \]
Now, when the truck is loaded until its mass is doubled (\(2 \cdot m_0\)) and its speed is doubled (\(2 \cdot v_0\)), the new momentum (\(p_{\text{loaded}}\)) can be calculated as follows:
\[ p_{\text{loaded}} = (2 \cdot m_0) \cdot (2 \cdot v_0) \]
\[ p_{\text{loaded}} = 4 \cdot m_0 \cdot v_0 \]
So, the new momentum of the loaded truck is \(4 \cdot m_0 \cdot v_0\).