A bob of mass m is suspended at a point O by a light string of le… | JEE Main 2025 Physics PYQ

MCQMediumJEE Main 2025 · 22 January, Shift 1Kinetic Energy & Work-Energy Theorem

A bob of mass $m$ is suspended at a point $O$ by a light string of length $l$ and left to perform vertical motion (circular) as shown in the figure. Initially, by applying horizontal velocity $v_0$ at the point ‘A’, the string becomes slack when the bob reaches at the point ‘D’. The ratio of the kinetic energy of the bob at the points B and C is:

A vertical circle with centre O: A is the lowest point, D the highest, B on the lower right and C on the upper right. The string has length l and a horizontal velocity v0 is applied at A. The radius OB makes 60 degrees with OA, and the radius OC makes 60 degrees with OD.

A
$2$
B
$1$
C
$4$
D
$3$

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