A small cart moves through a vertical loop of radius

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

A small cart moves through a vertical loop of radius rr. When the cart passes the very top of the loop at the minimum speed needed to stay on the track, the magnitude of the normal force exerted on the cart by the track is (a) mgmg (b) mv2r\dfrac{mv^{2}}{r} (c) zero (d) 2mg2mg

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