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Per NCERT §3.9, Galileo's key insight (1632) about projectile motion was which?
ATrajectory is always circular at any speed
BHorizontal and vertical motions are independent
CSpeed grows linearly with time always
DAcceleration is along the motion always
Answer & Solution
Correct answer: B. Horizontal and vertical motions are independent
NCERT §3.9: Galileo (Dialogue, 1632) — horizontal motion at constant velocity; vertical motion under g; the two are independent.
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