Question detail
If two objects collide and stick together, which of the following is true?
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. Kinetic energy is conserved.
- B. Momentum is conserved.
- C. Both momentum and kinetic energy are conserved.
- D. Neither momentum nor kinetic energy is conserved.
Answer
Momentum is conserved.
Explanation
In an inelastic collision where two objects stick together, momentum is conserved, but kinetic energy is not necessarily conserved due to energy transformation.
Common mistake
Confusing Momentum with Kinetic Energy
Students often confuse momentum with kinetic energy, thinking they are the same when explaining collisions.
Emphasize that momentum is a vector quantity defined as mass multiplied by velocity, while kinetic energy is a scalar quantity calculated as 0.5 times mass times velocity squared.
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