AP Physics 1 Multiple-Select Practice Question 2
A lightweight toy car crashes head-on into a heavier toy truck. Which of the following statements is true as a result of the collision? Select two answers.
Correct Answer: CD
C, D By Newton's Third Law, both vehicles experience the same magnitude of force and, therefore, the same impulse; so (A) is false. Invoking Newton's Second Law, in the form of impulse = change in momentum, we see that (B) is therefore also false. Since the car has a smaller mass than the truck, its acceleration will be greater in magnitude than that of the truck. Also, total momentum is always conserved in any collision by Conservation of Linear Momentum.