The momentum of a fast object compared to that of a slow object even if they both have the same velocity, is their masses.
Having same velocity but different masses results in different momentum.
Example: velocity = 20 m/s
Mass 1 = 10 Mass 2 = 50
Momentum 1 = 10×20 = 200 Ns
Momentum 2 = 50×20 = 1000 Ns
Hope it helped!
