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Per NCERT §4.10 eqn 4.16, the CENTRIPETAL force needed for a body of mass m moving at speed v in a circle of radius R is which?
Am R / v²
Bm R v
Cm v / R
Dm v² / R
Answer & Solution
Correct answer: D. m v² / R
NCERT eqn 4.16: f_c = m v²/R, directed toward the centre. From a_c = v²/R and F = m a.
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