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A book lies still on a table. Balancing its weight is an upward push from the table called the:
ANatural force
BNormal force
CNuclear force
DNet weight
Answer & Solution
Correct answer: B. Normal force
1. The book is not accelerating, so the forces on it must cancel.
2. Gravity pulls down, so something must push up by exactly as much.
3. That self-adjusting upward push is the normal force.
_Source: NCERT Class 11 Physics Part I, Chapter 5, Laws of Motion._
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