Per NCERT, in ANCIENT times (before Galileo), what did people INCORRECTLY believe about maintaining motion?
AThat a CONTINUOUS force was needed to keep an object moving with constant velocity (because they didn't account for friction)
BThat motion required heat
CThat no force was ever needed
DThat gravity pushes objects away
Answer & Solution
Correct answer: A. That a CONTINUOUS force was needed to keep an object moving with constant velocity (because they didn't account for friction)
Per NCERT §6.3, ancient thinkers believed motion required constant force — overlooking friction's role. Galileo + Newton corrected this.
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