Question detail
In a closed system, two vehicles collide and stick together. If vehicle A has a mass of 1000 kg and is moving at 20 m/s, and vehicle B has a mass of 1500 kg and is stationary, what is their combined velocity after the collision Explain your answer using Momentum and force (HT only) and momentum.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Momentum
Question
In a closed system, two vehicles collide and stick together. If vehicle A has a mass of 1000 kg and is moving at 20 m/s, and vehicle B has a mass of 1500 kg and is stationary, what is their combined velocity after the collision Explain your answer using Momentum and force (HT only) and momentum.
Answer
The combined velocity after the collision is 8 m/s.
Explanation
A strong answer should address (HT only) Apply qualitative momentum reasoning to vehicle safety scenarios directly. Use the context of Momentum and force (HT only) within Momentum, then state the relevant forces or motion reasoning with units where needed. The answer is correct when it names the key physics quantity, keeps moment and force distinct, and links the conclusion back to the approved learning objective.
Common mistake
Misunderstanding Momentum in Safety
Students often confuse momentum with kinetic energy when explaining vehicle safety features.
Focus on defining momentum as mass multiplied by velocity and emphasize that momentum is conserved in collisions, while kinetic energy can be transformed or dissipated.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.