Question 3 A small car meshes with a large truck in a head-on collision. Which o

Question

Question 3 A small car meshes with a large truck in a head-on collision. Which of the following statements conceming the momentum during the collision are comect? (There could be more than one comect cholce ) O The momentum of the truck is conserved The momentum of the car is conserved O The momentum of the car and the momentum of the truck are each conserved The car and the truck must undergo the same change in speed The momentum of the car truck system is conserved, but the momentum of each one separately is not conserved

Explanation / Answer

the impulse on the car is the same as the impulse on the truck

Impulse is force multiplied by time, and time of contact is the same for both, so the impulse is the same in magnitude for the two trucks. Change in momentum is equal to impulse, so changes in momenta are equal. With equal change in momentum and smaller mass, the change in velocity is larger for the smaller truck. Since acceleration is change in velocity over change in time, the acceleration is greater for the smaller truck.

Newton's Third Law of motions states that: When body A exerts a force on body B, body B exerts an equal force back on body A but in the opposite direction.

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