Question detail
Which of the following statements is true about momentum?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Momentum
Question
- A. Momentum is a scalar quantity
- B. Momentum is conserved in a closed system
- C. Momentum can be created or destroyed
- D. Momentum is always positive
Answer
Momentum is conserved in a closed system
Explanation
In a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event, meaning momentum is conserved.
Common mistake
Confusing Momentum with Kinetic Energy
Students often confuse momentum with kinetic energy, thinking they are the same concept.
Remember that momentum is defined as mass multiplied by velocity (p = mv), while kinetic energy is given by the formula Ek = 0.5 x m x v^2. Focus on the definitions and units of each quantity.
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