During the drilling of a metal surface the drill bit heats up. This heat comes from the _____?
Everyday Science / Physics — Multiple-choice practice
- A. None of these
- B. Flow of electric current
- C. Work done against friction
- D. Compression of air
Correct answer
Work done against friction
Explanation
Explanation Drilling involves contact between drill bit and metal, causing friction . Friction converts mechanical work into heat, heating the drill bit.
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