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PhysicsJEE Main 24 Jan 2026, Shift 2·Q5·MCQ·Moderate

Circular Motion · Potential energy and conservation

In case of vertical circular motion of a particle by a thread of length rr if the tension in the thread is zero at an angle 30∘30^\circ shown in figure, the velocity at the bottom point (A) of the circular path is
(gg = gravitational acceleration)
  1. (1)5gr\sqrt{5gr}
  2. (2)72gr\sqrt{\dfrac72 gr}
  3. (3)4gr\sqrt{4gr}
  4. (4)52gr\sqrt{\dfrac52 gr}

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