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In the standard spring set up, the block rests on a surface that is:
ASmooth
BRough
CSloped
DSticky
Answer & Solution
Correct answer: A. Smooth
1. Friction would complicate the energy accounting.
2. The idealised set up leaves it out.
3. So the block rests on a smooth horizontal surface.
_Source: NCERT Class 11 Physics Part I, Chapter 6, Work, Energy and Power._
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