Given data,
Mass of the bus is m = 9800 kg,
Speed of the bus is v = 40 mph,
Converting speed of the bus in m/s, {1 miles per hour = 0.447 meter per second}
v = 40*0.447
v = 17.88
Calculating momentum of the bus,
[tex]\begin{gathered} P=\text{ mv} \\ P=\text{ 9800}\times17.88 \\ P=\text{ 175,224 kg.m/s} \end{gathered}[/tex]