Per NCERT, GALILEO concluded from his studies of free-fall + inclined-plane motion that — which quantity is CONSTANT for objects in free fall?
ANeither is constant
BThe change in velocity with distance
CThe RATE of change of velocity with TIME (i.e. acceleration) — not rate of change with distance
DBoth rates are equal
Answer & Solution
Correct answer: C. The RATE of change of velocity with TIME (i.e. acceleration) — not rate of change with distance
Per NCERT §2.3, Galileo showed dv/dt is constant in free fall (not dv/dx). This led to defining acceleration as dv/dt.
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