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NEET 2011 (AIPMT, Prelims) · Potential Energy & Equilibrium

Potential Energy & Equilibrium question from NEET 2011 (AIPMT, Prelims)

Q13NEET 2011 · AIPMT · PRELIMSMedium

Potential Energy & Equilibrium

A particle of mass m is released from rest and follows a parabolic path as shown. Assuming that the displacement of the mass from the origin is small, which graph correctly depicts the position of the particle as a function of time?

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Answer: (b)

$V \propto x^2$ gives $F = -kx$ , so the motion is SHM about $x = 0$ .
Released from rest at a positive $x$ , so $x = A\cos\omega t$ : starts at maximum, smooth curve.
So the answer is (b).

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