MCQ practice · SSC Physics Board questions · Chapter 4: Work, Power and Energy
At the instant before a body falling from rest touches the ground, all of its energy is-
Think it through first, then pick an option.
- a potential energy
- b heat energy
- c sound energy
- d kinetic energy
Answer and explanation
Correct answer: d kinetic energy
The book says that just before touching the ground all the energy has turned into kinetic energy. Heat and sound appear only after the impact.
Why the other options are wrong
- a potential energy: This is not the answer: The book says that just before touching the ground all the energy has turned into kinetic energy. Heat and sound appear only after the impact.
- b heat energy: This is not the answer: The book says that just before touching the ground all the energy has turned into kinetic energy. Heat and sound appear only after the impact.
- c sound energy: This is not the answer: The book says that just before touching the ground all the energy has turned into kinetic energy. Heat and sound appear only after the impact.
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