Exam-style question
Try this first
In a perfectly elastic collision, which of the following statements is true?.
- A.Kinetic energy is conserved.
- B.Momentum is not conserved.
- C.Some kinetic energy is converted to thermal energy.
- D.The objects stick together after the collision.
Model answer
What a good answer should say
- Kinetic energy is conserved.
Explanation
Why this works
In a perfectly elastic collision, both momentum and kinetic energy are conserved, distinguishing it from inelastic collisions where kinetic energy is not conserved.
Common mistake
No common mistake is linked to this question yet.