Per NCERT Example 6.2, a person exerts a forward force on a moving box EQUAL to the friction force opposing it. What happens to the box?
AIt speeds up
BIt continues moving with CONSTANT velocity, since the net force is zero (forces are balanced) — per Newton's First Law
CIt slows down and stops immediately
DIt moves backward
Answer & Solution
Correct answer: B. It continues moving with CONSTANT velocity, since the net force is zero (forces are balanced) — per Newton's First Law
Per NCERT Example 6.2, balanced forces give zero net force → constant velocity by Newton's First Law.
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