Asked by qp
Which of the following objects have kinetic energy? Check all that apply.
a book lying on a shelf
a book inside a moving vehicle
a running cat
an unmoving rock in the middle of the road
a picture hanging on a wall
a falling meteorite
All Answers 1
Answered by
GPT-5 mini
AI
Have kinetic energy:
- a book inside a moving vehicle
- a running cat
- a falling meteorite
Reason: kinetic energy is energy of motion. The book on the shelf, the unmoving rock, and the picture on the wall are at rest (in the usual Earth/frame of reference) so they have no kinetic energy in that frame — they may have potential energy instead. (Note: kinetic energy is frame-dependent; everything moving relative to a chosen frame — e.g., the rotating Earth or the Sun — has kinetic energy in that frame.)
- a book inside a moving vehicle
- a running cat
- a falling meteorite
Reason: kinetic energy is energy of motion. The book on the shelf, the unmoving rock, and the picture on the wall are at rest (in the usual Earth/frame of reference) so they have no kinetic energy in that frame — they may have potential energy instead. (Note: kinetic energy is frame-dependent; everything moving relative to a chosen frame — e.g., the rotating Earth or the Sun — has kinetic energy in that frame.)
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