Which of the following would have more momentum than fiona, a 313kg hippo, running at 8m/s? a. a sea turtle moving at 0.9m/s b. a 150kg dolphin swimming at 18 m/s c. a 380kg horse moving at 4m/s d. a 190kg lion moving at 11m/s

Let's calculate the momentum of Fiona, given by the product between its mass and its speed:


Now let's compare it with the momentum of the other animals:
a) the mass of the sea turtle is missing, so we cannot calculate its momentum.
b) the momentum of the dolphin is 

c) the momentum of the horse is

d) the momentum of the lion is


And we can see that the correct answer is b), because the momentum of the dolphin is greater than the momentum of Fiona.