Answer:
D). 2.4 [tex]x10^{4} \frac{kg*m}{s}[/tex]
Step-by-step explanation:
Mary is driving toward north so the angle is 90° and Danny is driving toward the east so angle is 0°
Momentum Dary= [tex]900 kg* 22 \frac{m}{s}[/tex]
Momentum Danny= [tex]900 kg* 15 \frac{m}{s}[/tex]
So the total momentum is the magnitude:
Mag= [tex]\sqrt{(900 kg*22\frac{m}{s} )^{2}+(900kg*15\frac{m}{ys} )^{2}}[/tex]
mag= [tex]\sqrt{574290000}=23.96434852 x10^{3}[/tex]≅[tex]2.4 x10^{4}[/tex]
