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JEE Advanced2014PhysicsLaws of MotionActual

A wire, which passes through the hole in a small bead, is bent in the form of quarter of a circle. The wire is fixed vertically on ground as shown in the figure. The bead is released from near the top of the wire and it slides along the wire without friction. As the bead moves from A to B, the force it applies on the wire is

Options

  1. Aalways radially outwards.
  2. Balways radially inwards.
  3. Cradially outwards initially and radially inwards later.
  4. Dradially inwards initially and radially outwards later.

Correct answer

D. radially inwards initially and radially outwards later.

Step-by-step solution

Initially bead is applying radially inward normal force. During motion at an instant, N = 0, after that N will act radially outward.

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