What is the change in momentum of a 40 kg runner that travels from 5 m/s to 11 m/s

p=mv where p is momentum in kgms-1, m is mass/kg and v is velocity/ms-1

Therefore to find the change in momentum we can just substitute the numbers in and find the difference.

At 5ms-1 the runner has a momentum of 5*40=200kgm/s
At 11ms-1 the runner has a momentum of 11*40=440kgm/s

Finding the difference, the change of momentum is 240kgm/s

Distance^2= yellow line ^2 (see picture) = 30^2 + 49^2so distance = squareroot of (300^2 +49^2)i dont know if this is how to solve it, but i cnt think of another way