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Centripetal force on a particle of mass m moving with speed v on a circle of radius r is
Amvr
Bv²/r
Cm²v/r
Dmv²/r
Answer & Solution
Correct answer: D. mv²/r
1. Centripetal acceleration a = v²/r is directed radially inward.
2. By Newton's second law the required net inward force is F = ma.
3. So F = mv²/r.
_Source: Maharashtra Balbharati Std XII Physics, Ch 1 "Rotational Dynamics" §1.2.2_
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