Atruck going 15 km/h has a head-on collision with a small car going 30 km/h. which statement best describes the situation?

a. the truck has the greater change of momentum because it has the greater mass.
b. none of the above is necessarily true.
c. neither the car nor the truck changes its momentum in the collision because momentum is conserved.
d. they both have the same change in magnitude of momentum because momentum is conserved.
e. the car has the greater change of momentum because it has the greater speed.

The statement that best describes the situation is that they both have the same change in magnitude of momentum because momentum is conserved. Option D is correct

Momentum has to do with the strength an object has when moving with speed.

For the truck and the small car given in the question, there was no external force acting on the system.

Since there was no force acting on the system, we can conclude that the linear momentum of the system is conserved that is there is no change in the linear momentum of the system.

Learn more here: link

  d. They both have the same change in magnitude of momentum because momentum is conserved.                

Explanation:

      We know that if there is no any external force on the system the linear     momentum of the system remain conserve.Or in the other other words change in the linear momentum is zero.

    Here the external force is zero ,that is why initial and the final momentum will be conserved.

     change in the momentum  for both car as well as truck will be same.Because momentum should be conserved.

Therefore the answer is -d