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AP EAMCET201823 Apr 2018Evening ShiftPhysicsLaws of MotionActual

A bead of mass 100 ~g is attached to one end of a spring of natural length L and spring constant k= ( 3 +1) m g L , where m is the mass of bead. The other end of the spring is fixed at point A on a smooth vertical ring of radius R as shown in the figure. The normal reaction at B just after it is released to move is (take, g=9.8 ~ms ⁻² )

Options

  1. A1.73 ~N
  2. B, 2.23 ~N
  3. C2.44 ~N
  4. D2.55 ~N

Correct answer

D. 2.55 ~N

Step-by-step solution

Normal reaction = Resultant of spring force k x and weight mg . = (k^2 x^2+m^2 g^2 ) =2.55 ~N

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