Answer: 10.78 kg×m/s
Justification:
1) Momentum is a vector.
2) The magnitude of a vector is determined from is components in this way:
Magnitude² = (x-component)² + (y-component)²
3) Then, given x-component = 9.80 kg×m/s , and the y-component 4.50 kg×m/s, by replacing into the equation above, you get:
Magnitude² = [9.80 kg×m/s]² + [4.50 kg×m/s]² = 116.29 [kg×m/s]²
Now take square root on both sides and you get:
Magnitude = 10.78 kg×m/s
Note that I amended the units of the momentun, since m/s is not the rigth unit.
