The speed of a passenger car is 2 times the speed of a truck, and the mass of a truck is 2 times that

The speed of a passenger car is 2 times the speed of a truck, and the mass of a truck is 2 times that of a passenger car. Compare the values of kinetic energies and impulses of cars.

Let’s designate the speed of a passenger car 2v, mass – m, then its impulse and kinetic energy are equal:
p1 = m * 2v = 2mv
E1 = m * (2v) ^ 2 = 4mv ^ 2

The momentum and kinetic energy of a truck are equal:

p2 = 2m * v = 2mv
E2 = 2m * v ^ 2 = 2mv ^ 2

p1 / p2 = 1, E1 / E2 = 2

Answer: the impulses of cars are equal, the kinetic energy of a passenger car is 2 times more