Per NCERT, can a particle with POSITIVE acceleration always be 'speeding up'?
AYes — positive a always means speeding up
BNo — positive acceleration with negative velocity means the particle is slowing down (decelerating in motion sense)
CPositive a is impossible
DAlways opposite to velocity
Answer & Solution
Correct answer: B. No — positive acceleration with negative velocity means the particle is slowing down (decelerating in motion sense)
Per NCERT Exercise 2.7(d) hint, positive a + negative v = decelerating motion. Speeding up requires a·v > 0.
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