alleryStart learning →A person pushes a moving box exactly as hard as friction resists it. The box will:
AKeep constant speed
BKeep gaining speed
CKeep losing weight
DKeep changing mass
Answer & Solution
Correct answer: A. Keep constant speed
1. The two forces are equal and opposite.
2. The net force is therefore zero.
3. So the box keeps a constant speed.
_Source: syllabus Science Class IX, Chapter 6, How Forces Affect Motion._
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